Why is my Bitcoin transaction not confirming

Ghosted by Coinberry, Frozen Withdrawal

TLDR: Withdrew bitcoin successfully twice. Tried again on May 26th and it has been frozen in "processing" for over 2 weeks and Coinberry has not responded. Support has disappeared and updates have stopped. 387 users affected on May 30th, 123 remain affected on June 5th, my issue is unresolved on June 10th. Funding confirmations requested by and sent to Coinberry on June 4th. Still no response.
First of all, Coinberry claims that there has been substantial delays for various reasons. They claim that they are having issues on their side pertaining to account verifications and increased traffic. Status updates were being posted to Coinberry's official status page, but have stopped since June 5th, and customer support email, chat, and phone are all down. The fishiest part however is that, according to their website, only 123 users of the 327 initially affected remained on June 5th. It is hard to believe that they managed to get through ~50 users a day and still have not been able to resolve my issue or AT LEAST respond to my emails. Another fishy part is that Coinberry claims they cannot see my funding on "their ledger" but they keep a "Receipt No." for every transaction in the activity log, which (along with the e-transfer confirmation emails), I sent back to Coinberry on June 4th.
As many others have posted, I've had this withdrawal stuck as "processing" for over 2 weeks. My issue is not with the initial delay. However, the issue is that their customer support seems to have disappeared. I have been trying to reach support through email for two weeks now. The only response I received was about a week ago, requesting for proof of the e-transfer confirmations relating to the transactions on my account. I replied, with the confirmations, within minutes and have not heard back since. I have sent several follow-up emails trying to reach support as well as message them on facebook, but still, there is still no response. The least Coinberry should do is provide each affected user with an expected timeline for resolution. The CEO posted a blog "addressing" the speculation around Coinberry's insolvency. Honestly, this blog seems worthless as it is essentially saying is that they are "having issues but not insolvent" so he is chalking it up to service issues and claiming that "the team is working to resolve it asap". If this really was the case, it would be nice to receive a response from support to confirm that the resolution is on way. On that blog it states that "you may need to re-verify" or there will be delays if you "used a different bank account (#1 reason)", but my account IS verified and I emailed support confirming the transactions. Still no response, so I am assuming it is not being resolved.
I had chosen Coinberry because I found it to be very easy-to-use and trustworthy (considering they boast their "PIPEDA/FINTRAC" compliance) and the platform seemed to be one of the best I had used personally. Now, I am posting here in hopes that others take caution before depositing any funds into Coinberry, as well as in hopes that they may respond to me here as it seems to be the only place where people have been able to contact support. Again, they WILL NOT RESPOND to any queries that I have tried, so think twice before depositing any funds (during this time, at least).
I do not think Coinberry is necessarily a "scam" or a "Quadriga 2.0" as many others are claiming, and I think that they may legitamitely be working to resolve the issue. However, the fact that customers need to resort to research and reddit to find answers about situations like these, combined with the sketchy stories of past crypto exchanges, has made me rather disappointed with Coinberry at this time. Right now is definitely a shaky time in terms of how trustworthy Coinberry really is/whether it is setting up for a Quadriga-type scenario.
I will update the thread if I receive a response from Coinberry support. Feel free to post your own experiences.
*Update (10/06/2020) - DM'd u/CoinberryOfficial, awaiting further response.
*Update (11/06/2020) - Received initial DM response saying the same thing as the email I received a week ago, awaiting for further contact.
*Update (12/06/2020) - No further response via reddit or email. Coinberry status page updated on 11/06/2020 "Mobile app versions prior to 111.8 (on iOS) and 1.11.8 (on Android) were decommissioned on June 11, 2020". Updates about upgrading a mobile app but nothing about numerous counts of delayed withdrawals and locked accounts? Still no email or DM response.
*Update (12/06/2020) - Contacted back by u/CoinberryOfficial stating "Hi apologies for the delay, on our end the withdrawal is indicated as processed and completed, can you kindly verify on your end?" but I have not yet received my withdrawal. Working through the issue over DM.
*Update (13/06/2020) - Working slowly with u/CoinberryOfficial but for now, I have been given the exact same answer as I was in the only email I have received from support in the 3 weeks since I tried to withdraw my mere 0.01989 BTC. The response I received was "No your withdrawal is currently still processed and will be sent out once we can locate the deposit that was credited to your account on may 15th. We are unable to locate the deposit made on may 15th , but can locate the second one made on may 26th. We do not require further verification but do require to verify on your end that it was not accidently blocked by your bank. For the security of your information we do kindly ask that you continue this correspondence with support via email." Now, I have to wait till monday because it is after office hours (like that means anything, been trying to reach them all week lol). This is frustrating because I have already sent proof and confirmations over a week ago of interac e-transfers, bank statements, and Coinberry activity, but the support team never replied. It makes no sense as to how it "cannot be located" because I had successfully withdrew all the BTC purchased from the funds on the 15th and simply hadn't funded it again until the 26th. Next update on 15/06/2020 -.-
*UPDATE (15/06/2020) - Still NO RESPONSE from support or u/CoinberryOfficial. Don’t know when I’m going to get my funds at this point, as on Reddit I was told this would be “resolved first thing Monday morning”. So disappointed.
*UPDATE (16/06/2020) - u/CoinberryOfficial responded this morning stating "Sorry for the delay, support will make contact with you shortly". 5 hours later, still no response. I am assuming "business hours" are also over for the day now too. Update posted by the CEO, full of bullshit from what I can tell, referring to these issues and stating "all hands on deck", "we doubled customer success staff" and worst of all "This meant getting customers’ funds to them promptly...our customer success team can monitor, in real time, what our customers may need and where an issue could arise, as well as being alerted to any potential customer service delays...has allowed our customer success team to ensure a seamless, consistent customer experience". Ridiculous.
UPDATE: As of today (25/06/2020), I have received my funds and the issue has finally been RESOLVED. Thanks to Barry from Coinberry support. Reached out on the websites live chat and seem to have gotten extremely lucky that Barry was there and remained online, chatting to me, until the issue was completely resolved. Although the delays throughout this whole month were a major issue, it is a relief that Coinberry does in fact seem to be resolving these issues.
submitted by rockyfuntime1 to CoinberryHQ [link] [comments]

Dolla, Send Money Easily Anywhere

Dolla, Send Money Easily Anywhere

Dolla is an emerging cryptocurrency that has been under creation and development when it was founded in 2016. It aims to solve the problems that current cryptocurrencies face in becoming a globally adopted payment solution, these problems are predominantly based around speed, throughput and cost.

https://preview.redd.it/f3m6h2961ua51.png?width=820&format=png&auto=webp&s=e95710da3fe777b308477c9bb301a1123c17855f
Bitcoin for example has been proven to only handle a very small amount of transactions per second, between 3-6, with payments taking about an hour to finalise. These figures are clearly not scalable for Bitcoin to ever be used as a payment solution on a global level. Dolla on the other hand has a throughput of 10,000 transactions per second, an exciting development in the crypto world with their transaction confirmation time being only 1 second. These are the kind of features we look for in a global payment solution and Dolla appears to be able to deliver.
Dolla blockchain is developed using high-assurance methodologies. The reference implementation is written in the Haskell programming language, focusing on correctness and auditability.
In contrast to many other permissioned cryptocurrencies, Dolla is decentralised and not controlled by a single company or individual. Dolla is designed as a consortium fork-free blockchain with a linear history, which enables it to deliver high throughput, low latency and immediate finality. A majority quorum of consensus members agrees on each block to be appended to the blockchain in a lockstep fashion and a Dolla block is not committed until the majority quorum has decided to include it. Once it is committed, the block and the transactions within it are irreversible. Thus Dolla provides immediate finality.

⛔️ Beware of Scam! Dolla admins would NEVER initiate contact with you privately to offer deals or suggest 3rd party services. ⛔️

Official Site ➡️ https://dolla.org
Official Video ➡️ https://youtu.be/0Er2NpSHaCs

SOCIAL MEDIA CHANNELS:
📌 Facebook Group: www.facebook.com/groups/DollaCommunity/
📌 Facebook Page: https://www.facebook.com/dollanextgen/
📌 Linkedin Group: www.linkedin.com/groups/10388252
📌 Linkedin Page: https://www.linkedin.com/company/dollaorg/
📌 Twitter: twitter.com/dollacurrency
📌 Telegram Group: https://t.me/dolla_ico
submitted by Shudip_47 to Dolla [link] [comments]

/r/Scams Common Scam Master Post

Hello visitors and subscribers of scams! Here you will find a master list of common (and uncommon) scams that you may encounter online or in real life. Thank you to the many contributors who helped create this thread!

If you know of a scam that is not covered here, write a comment and it will be added to the next edition.

Previous threads: https://old.reddit.com/Scams/search?q=common+scams+master+post&restrict_sr=on
Blackmail email scam thread: https://old.reddit.com/Scams/comments/g8jqnthe_blackmail_email_scam_part_5//
Some of these articles are from small, local publications and refer to the scam happening in a specific area. Do not think that this means that the scam won't happen in your area.

Spoofing

Caller ID spoofing
It is very easy for anyone to make a phone call while having any number show up on the caller ID of the person receiving the phone call. Receiving a phone call from a certain number does not mean that the person/company who owns that number has actually called you.
Email spoofing
The "from" field of an email can be set by the sender, meaning that you can receive scam emails that look like they are from legitimate addresses. It's important to never click links in emails unless absolutely necessary, for example a password reset link you requested or an account activation link for an account you created.
SMS spoofing
SMS messages can be spoofed, so be wary of messages that seem to be from your friends or other trusted people.

The most common scams

The fake check scam (Credit to nimble2 for this part)
The fake check scam arises from many different situations (for instance, you applied for a job, or you are selling something on a place like Craigslist, or someone wants to purchase goods or services from your business, or you were offered a job as a mystery shopper, you were asked to wrap your car with an advertisement, or you received a check in the mail for no reason), but the bottom line is always something like this:
General fraudulent funds scams If somebody is asking you to accept and send out money as a favour or as part of a job, it is a fraudulent funds scam. It does not matter how they pay you, any payment on any service can be fraudulent and will be reversed when it is discovered to be fraudulent.
Phone verification code scams Someone will ask you to receive a verification text and then tell you to give them the code. Usually the code will come from Google Voice, or from Craigslist. In the Google version of the scam, your phone number will be used to verify a Google Voice account that the scammer will use to scam people with. In the Craigslist version of the scam, your phone number will be used to verify a Craigslist posting that the scammer will use to scam people. There is also an account takeover version of this scam that will involve the scammer sending a password reset token to your phone number and asking you for it.
Bitcoin job scams
Bitcoin job scams involve some sort of fraudulent funds transfer, usually a fake check although a fraudulent bank transfer can be used as well. The scammer will send you the fraudulent money and ask you to purchase bitcoins. This is a scam, and you will have zero recourse after you send the scammer bitcoins.
Email flooding
If you suddenly receive hundreds or thousands of spam emails, usually subscription confirmations, it's very likely that one of your online accounts has been taken over and is being used fraudulently. You should check any of your accounts that has a credit card linked to it, preferably from a computer other than the one you normally use. You should change all of your passwords to unique passwords and you should start using two factor authentication everywhere.
Boss/CEO scam A scammer will impersonate your boss or someone who works at your company and will ask you to run an errand for them, which will usually be purchasing gift cards and sending them the code. Once the scammer has the code, you have no recourse.
Employment certification scams
You will receive a job offer that is dependent on you completing a course or receiving a certification from a company the scammer tells you about. The scammer operates both websites and the job does not exist.
Craigslist fake payment scams
Scammers will ask you about your item that you have listed for sale on a site like Craigslist, and will ask to pay you via Paypal. They are scamming you, and the payment in most cases does not actually exist, the email you received was sent by the scammers. In cases where you have received a payment, the scammer can dispute the payment or the payment may be entirely fraudulent. The scammer will then either try to get you to send money to them using the fake funds that they did not send to you, or will ask you to ship the item, usually to a re-shipping facility or a parcel mule.
General fraudulent funds scams The fake check scam is not the only scam that involves accepting fraudulent/fake funds and purchasing items for scammers. If your job or opportunity involves accepting money and then using that money, it is almost certainly a frauduent funds scam. Even if the payment is through a bank transfer, Paypal, Venmo, Zelle, Interac e-Transfer, etc, it does not matter.
Credit card debt scam
Fraudsters will offer to pay off your bills, and will do so with fraudulent funds. Sometimes it will be your credit card bill, but it can be any bill that can be paid online. Once they pay it off, they will ask you to send them money or purchase items for them. The fraudulent transaction will be reversed in the future and you will never be able to keep the money. This scam happens on sites like Craigslist, Twitter, Instagram, and also some dating sites, including SeekingArrangement.
The parcel mule scam
A scammer will contact you with a job opportunity that involves accepting and reshipping packages. The packages are either stolen or fraudulently obtained items, and you will not be paid by the scammer. Here is a news article about a scam victim who fell for this scam and reshipped over 20 packages containing fraudulently acquired goods.
The Skype sex scam
You're on Facebook and you get a friend request from a cute girl you've never met. She wants to start sexting and trading nudes. She'll ask you to send pictures or videos or get on webcam where she can see you naked with your face in the picture. The scam: There's no girl. You've sent nudes to a guy pretending to be a girl. As soon as he has the pictures he'll demand money and threaten to send the pictures to your friends and family. Sometimes the scammer will upload the video to a porn site or Youtube to show that they are serious.
What to do if you are a victim of this scam: You cannot buy silence, you can only rent it. Paying the blackmailer will show them that the information they have is valuable and they will come after you for more money. Let your friends and family know that you were scammed and tell them to ignore friend requests or messages from people they don't know. Also, make sure your privacy settings are locked down and consider deactivating your account.
The underage girl scam
You're on a dating site or app and you get contacted by a cute girl. She wants to start sexting and trading nudes. Eventually she stops communicating and you get a call from a pissed off guy claiming to be the girl's father, or a police officer, or a private investigator, or something else along those lines. Turns out the girl you were sexting is underage, and her parents want some money for various reasons, such as to pay for a new phone, to pay for therapy, etc. There is, of course, no girl. You were communicating with a scammer.
What to do if you are a victim of this scam: Stop picking up the phone when the scammers call. Do not pay them, or they will be after you for more money.
Phishing
Phishing is when a scammer tries to trick you into giving information to them, such as your password or private financial information. Phishing messages will usually look very similar to official messages, and sometimes they are identical. If you are ever required to login to a different account in order to use a service, you should be incredibly cautious.
The blackmail email scam The exact wording of the emails varies, but there are generally four main parts. They claim to have placed software/malware on a porn/adult video site, they claim to have a video of you masturbating or watching porn, they threaten to release the video to your friends/family/loved ones/boss/dog, and they demand that you pay them in order for them to delete the video. Rest assured that this is a very common spam campaign and there is no truth behind the email or the threats. Here are some news articles about this scam.
The blackmail mail scam
This is very similar to the blackmail email scam, but you will receive a letter in the mail.
Rental scams Usually on local sites like Craigslist, scammers will steal photos from legitimate real estate listings and will list them for rent at or below market rate. They will generally be hesitant to tell you the address of the property for "safety reasons" and you will not be able to see the unit. They will then ask you to pay them a deposit and they claim they will ship you the keys. In reality, your money is gone and you will have no recourse.
Craigslist vehicle scams A scammer will list a vehicle on Craigslist and will offer to ship you the car. In many cases they will also falsely claim to sell you the car through eBay or Amazon. If you are looking for a car on Craigslist and the seller says anything about shipping the car, having an agent, gives you a long story about why they are selling the car, or the listing price is far too low, you are talking to a scammer and you should ignore and move on.
Advance-fee scam, also known as the 419 scam, or the Nigerian prince scam. You will receive a communication from someone who claims that you are entitled to a large sum of money, or you can help them obtain a large sum of money. However, they will need money from you before you receive the large sum.
Man in the middle scams
Man in the middle scams are very common and very hard to detect. The scammer will impersonate a company or person you are legitimately doing business with, and they will ask you to send the money to one of their own bank accounts or one controlled by a money mule. They have gained access to the legitimate persons email address, so there will be nothing suspicious about the email. To prevent this, make contact in a different way that lets you verify that the person you are talking to is the person you think you are talking to.
Cam girl voting/viewer scam
You will encounter a "cam girl" on a dating/messaging/social media/whatever site/app, and the scammer will ask you to go to their site and sign up with your credit card. They may offer a free show, or ask you to vote for them, or any number of other fake stories.
Amateur porn recruitment scam
You will encounter a "pornstar" on a dating/messaging/social media/whatever site/app, and the scammer will ask you to create an adult film with hehim, but first you need to do something. The story here is usually something to do with verifying your age, or you needing to take an STD test that involves sending money to a site operated by the scammer.
Hot girl SMS spam
You receive a text from a random number with a message along the lines of "Hey babe I'm here in town again if you wanted to meet up this time, are you around?" accompanied by a NSFW picture of a hot girl. It's spam, and they'll direct you to their scam website that requires a credit card.
Identity verification scam
You will encounter someone on a dating/messaging/social media/whatever site/app, and the scammer will ask that you verify your identity as they are worried about catfishing. The scammer operates the site, and you are not talking to whoever you think you are talking to.
This type of scam teases you with something, then tries to make you sign up for something else that costs money. The company involved is often innocent, but they turn a blind eye to the practice as it helps their bottom line, even if they have to occasionally issue refunds. A common variation takes place on dating sites/dating apps, where you will match with someone who claims to be a camgirl who wants you to sign up for a site and vote for her. Another variation takes place on local sites like Craigslist, where the scammers setup fake rental scams and demand that you go through a specific service for a credit check. Once you go through with it, the scammer will stop talking to you. Another variation also takes place on local sites like Craigslist, where scammers will contact you while you are selling a car and will ask you to purchase a Carfax-like report from a specific website.
Multi Level Marketing or Affiliate Marketing
You apply for a vague job listing for 'sales' on craigslist. Or maybe an old friend from high school adds you on Facebook and says they have an amazing business opportunity for you. Or maybe the well dressed guy who's always interviewing people in the Starbucks that you work at asks if you really want to be slinging coffee the rest of your life. The scam: MLMs are little more than pyramid schemes. They involve buying some sort of product (usually snake oil health products like body wraps or supplements) and shilling them to your friends and family. They claim that the really money is recruiting people underneath you who give you a slice of whatever they sell. And if those people underneath you recruit more people, you get a piece of their sales. Ideally if you big enough pyramid underneath you the money will roll in without any work on your part. Failure to see any profit will be your fault for not "wanting it enough." The companies will claim that you need to buy their extra training modules or webinars to really start selling. But in reality, the vast majority of people who buy into a MLM won't see a cent. At the end of the day all you'll be doing is annoying your friends and family with your constant recruitment efforts. What to look out for: Recruiters love to be vague. They won't tell you the name of the company or what exactly the job will entail. They'll pump you up with promises of "self-generating income", "being your own boss", and "owning your own company." They might ask you to read books about success and entrepreneurs. They're hoping you buy into the dream first. If you get approached via social media, check their timelines. MLMs will often instruct their victims to pretend that they've already made it. They'll constantly post about how they're hustling and making the big bucks and linking to youtube videos about success. Again, all very vague about what their job actually entails. If you think you're being recruited: Ask them what exactly the job is. If they can't answer its probably a MLM. Just walk away.

Phone scams

You should generally avoid answering or engaging with random phone calls. Picking up and engaging with a scam call tells the scammers that your phone number is active, and will usually lead to more calls.
Tax Call
You get a call from somebody claiming to be from your countries tax agency. They say you have unpaid taxes that need to be paid immediately, and you may be arrested or have other legal action taken against you if it is not paid. This scam has caused the American IRS, Canadian CRA, British HMRC, and Australian Tax Office to issue warnings. This scam happens in a wide variety of countries all over the world.
Warrant Call
Very similar to the tax call. You'll get a phone call from an "agent", "officer", "sheriff", or other law enforcement officer claiming that there is a warrant out for your arrest and you will be arrested very soon. They will then offer to settle everything for a fee, usually paid in giftcards.
[Legal Documents/Process Server Calls]
Very similar to the warrant call. You'll get a phone call from a scammer claiming that they are going to serve you legal documents, and they will threaten you with legal consequences if you refuse to comply. They may call themselves "investigators", and will sometimes give you a fake case number.
Student Loan Forgiveness Scam
Scammers will call you and tell you about a student loan forgiveness program, but they are interested in obtaining private information about you or demanding money in order to join the fake program.
Tech Support Call You receive a call from someone with a heavy accent claiming to be a technician Microsoft or your ISP. They inform you that your PC has a virus and your online banking and other accounts may be compromised if the virus is not removed. They'll have you type in commands and view diagnostics on your PC which shows proof of the virus. Then they'll have you install remote support software so the technician can work on your PC, remove the virus, and install security software. The cost of the labor and software can be hundreds of dollars. The scam: There's no virus. The technician isn't a technician and does not work for Microsoft or your ISP. Scammers (primarily out of India) use autodialers to cold-call everyone in the US. Any file they point out to you or command they have you run is completely benign. The software they sell you is either freeware or ineffective. What to do you if you're involved with this scam: If the scammers are remotely on your computer as you read this, turn off your PC or laptop via the power button immediately, and then if possible unplug your internet connection. Some of the more vindictive tech scammers have been known to create boot passwords on your computer if they think you've become wise to them and aren't going to pay up. Hang up on the scammers, block the number, and ignore any threats about payment. Performing a system restore on your PC is usually all that is required to remove the scammer's common remote access software. Reports of identity theft from fake tech calls are uncommon, but it would still be a good idea to change your passwords for online banking and monitor your accounts for any possible fraud. How to avoid: Ignore any calls claiming that your PC has a virus. Microsoft will never contact you. If you're unsure if a call claiming to be from your ISP is legit, hang up, and then dial the customer support number listed on a recent bill. If you have elderly relatives or family that isn't tech savvy, take the time to fill them in on this scam.
Chinese government scam
This scam is aimed at Chinese people living in Europe and North America, and involves a voicemail from someone claiming to be associated with the Chinese government, usually through the Chinese consulate/embassy, who is threatening legal action or making general threats.
Chinese shipping scam
This scam is similar to the Chinese government scam, but involves a seized/suspicious package, and the scammers will connect the victim to other scammers posing as Chinese government investigators.
Social security suspension scam
You will receive a call from someone claiming to work for the government regarding suspicious activity, fraud, or serious crimes connected to your social security number. You'll be asked to speak to an operator and the operator will explain the steps you need to follow in order to fix the problems. It's all a scam, and will lead to you losing money and could lead to identity theft if you give them private financial information.
Utilities cutoff
You get a call from someone who claims that they are from your utility company, and they claim that your utilities will be shut off unless you immediately pay. The scammer will usually ask for payment via gift cards, although they may ask for payment in other ways, such as Western Union or bitcoin.
Relative in custody Scammer claims to be the police, and they have your son/daughtenephew/estranged twin in custody. You need to post bail (for some reason in iTunes gift cards or MoneyGram) immediately or the consequences will never be the same.
Mexican family scam
This scam comes in many different flavours, but always involves someone in your family and Mexico. Sometimes the scammer will claim that your family member has been detained, sometimes the scammer will claim that your family member has been kidnapped, and sometimes the scammer will claim that your family member is injured and needs help.
General family scams
Scammers will gather a large amount of information about you and target your family members using different stories with the goal of gettimg them to send money.
One ring scam
Scammers will call you from an international number with the goal of getting you to return their call, causing you to incur expensive calling fees.

Online shopping scams

THE GOLDEN RULE OF ONLINE SHOPPING: If it sounds too good to be true, it probably is.
Dropshipping
An ad on reddit or social media sites like Facebook and Instagram offers items at huge discounts or even free (sometimes requiring you to reblog or like their page). They just ask you to pay shipping. The scam: The item will turn out to be very low quality and will take weeks or even months to arrive. Sometimes the item never arrives, and the store disappears or stops responding. The seller drop-ships the item from China. The item may only cost a few dollars, and the Chinese government actually pays for the shipping. You end up paying $10-$15 dollars for a $4 item, with the scammer keeping the profit. If you find one of these scams but really have your heart set on the item, you can find it on AliExpress or another Chinese retailer.
Influencer scams
A user will reach out to you on a social media platform, usually Instagram, and offer you the chance to partner with them and receive a free/discounted product, as long as you pay shipping. This is a different version of the dropshipping scam, and is just a marketing technique to get you to buy their products.
Triangulation fraud
Triangulation fraud occurs when you make a purchase on a site like Amazon or eBay for an item at a lower than market price, and receive an item that was clearly purchased new at full price. The scammer uses a stolen credit card to order your item, while the money from the listing is almost all profit for the scammer.
Instagram influencer scams
Someone will message you on Instagram asking you to promote their products, and offering you a discount code. The items are Chinese junk, and the offer is made to many people at a time.
Cheap Items
Many websites pop up and offer expensive products, including electronics, clothes, watches, sunglasses, and shoes at very low prices. The scam: Some sites are selling cheap knock-offs. Some will just take your money and run. What to do if you think you're involved with this scam: Contact your bank or credit card and dispute the charge. How to avoid: The sites often have every brand-name shoe or fashion item (Air Jordan, Yeezy, Gucci, etc) in stock and often at a discounted price. The site will claim to be an outlet for a major brand or even a specific line or item. The site will have images at the bottom claiming to be Secured by Norton or various official payment processors but not actual links. The site will have poor grammar and a mish-mash of categories. Recently, established websites will get hacked or their domain name jacked and turned into scam stores, meaning the domain name of the store will be completely unrelated to the items they're selling. If the deal sounds too good to be true it probably is. Nobody is offering brand new iPhones or Beats or Nintendo Switches for 75% off.
Cheap Amazon 3rd Party Items
You're on Amazon or maybe just Googling for an item and you see it for an unbelievable price from a third-party seller. You know Amazon has your back so you order it. The scam: One of three things usually happen: 1) The seller marks the items as shipped and sends a fake tracking number. Amazon releases the funds to the seller, and the seller disappears. Amazon ultimately refunds your money. 2) The seller immediately cancels the order and instructs you to re-order the item directly from their website, usually with the guarantee that the order is still protected by Amazon. The seller takes your money and runs. Amazon informs you that they do not offer protection on items sold outside of Amazon and cannot help you. 2) The seller immediately cancels the order and instructs you to instead send payment via an unused Amazon gift card by sending the code on the back via email. Once the seller uses the code, the money on the card is gone and cannot be refunded. How to avoid: These scammers can be identified by looking at their Amazon storefronts. They'll be brand new sellers offering a wide range of items at unbelievable prices. Usually their Amazon names will be gibberish, or a variation on FIRSTNAME.LASTNAME. Occasionally however, established storefronts will be hacked. If the deal is too good to be true its most likely a scam.
Scams on eBay
There are scams on eBay targeting both buyers and sellers. As a seller, you should look out for people who privately message you regarding the order, especially if they ask you to ship to a different address or ask to negotiate via text/email/a messaging service. As a buyer you should look out for new accounts selling in-demand items, established accounts selling in-demand items that they have no previous connection to (you can check their feedback history for a general idea of what they bought/sold in the past), and lookout for people who ask you to go off eBay and use another service to complete the transaction. In many cases you will receive a fake tracking number and your money will be help up for up to a month.
Scams on Amazon
There are scams on Amazon targeting both buyers and sellers. As a seller, you should look out for people who message you about a listing. As a buyer you should look out for listings that have an email address for you to contact the person to complete the transaction, and you should look out for cheap listings of in-demand items.
Scams on Reddit
Reddit accounts are frequently purchased and sold by fraudsters who wish to use the high karma count + the age of the account to scam people on buy/sell subreddits. You need to take precautions and be safe whenever you are making a transaction online.
Computer scams
Virus scam
A popup or other ad will say that you have a virus and you need to follow their advice in order to remove it. They are lying, and either want you to install malware or pay for their software.

Assorted scams

Chinese Brushing / direct shipping
If you have ever received an unsolicited small package from China, your address was used to brush. Vendors place fake orders for their own products and send out the orders so that they can increase their ratings.
Money flipping
Scammer claims to be a banking insider who can double/triple/bazoople any amount of money you send them, with no consequences of any kind. Obviously, the money disappears into their wallet the moment you send it.

Door to door scams

As a general rule, you should not engage with door to door salesmen. If you are interested in the product they are selling, check online first.
Selling Magazines
Someone or a group will come to your door and offer to sell a magazine subscription. Often the subscriptions are not for the duration or price you were told, and the magazines will often have tough or impossible cancellation policies.
Energy sales
Somebody will come to your door claiming to be from an energy company. They will ask to see your current energy bill so that they can see how much you pay. They will then offer you a discount if you sign up with them, and promise to handle everything with your old provider. Some of these scammers will "slam" you, by using your account number that they saw on your bill to switch you to their service without authorization, and some will scam you by charging higher prices than the ones you agreed on.
Security system scams
Scammers will come to your door and ask about your security system, and offer to sell you a new one. These scammers are either selling you overpriced low quality products, or are casing your home for a future burglary.
They ask to enter your home
While trying to sell you whatever, they suddenly need to use your bathroom, or they've been writing against the wall and ask to use your table instead. Or maybe they just moved into the neighborhood and want to see how you decorate for ideas.
They're scoping out you and your place. They want to see what valuables you have, how gullible you are, if you have a security system or dogs, etc.

Street scams

Begging With a Purpose
"I just need a few more dollars for the bus," at the bus station, or "I just need $5 to get some gas," at a gas station. There's also a variation where you will be presented with a reward: "I just need money for a cab to get uptown, but I'll give you sports tickets/money/a date/a priceless vase."
Three Card Monte, Also Known As The Shell Game
Unbeatable. The people you see winning are in on the scam.
Drop and Break
You bump into someone and they drop their phone/glasses/fancy bottle of wine/priceless vase and demand you pay them back. In reality, it's a $2 pair of reading glasses/bottle of three-buck-chuck/tasteful but affordable vase.
CD Sales
You're handed a free CD so you can check out the artist's music. They then ask for your name and immediately write it on the CD. Once they've signed your name, they ask you for money, saying they can't give it to someone else now. Often they use dry erase markers, or cheap CD sleeves. Never use any type of storage device given to you by a random person, as the device can contain malware.
White Van Speaker Scam
You're approached and offered speakers/leather jackets/other luxury goods at a discount. The scammer will have an excuse as to why the price is so low. After you buy them, you'll discover that they are worthless.
iPhone Street Sale
You're approached and shown an iPhone for sale, coming in the box, but it's open and you can see the phone. If you buy the phone, you'll get an iPhone box with no iPhone, just some stones or cheap metal in it to weigh it down.
Buddhist Monk Pendant
A monk in traditional garb approaches you, hands you a gold trinket, and asks for a donation. He holds either a notebook with names and amounts of donation (usually everyone else has donated $5+), or a leaflet with generic info. This is fairly common in NYC, and these guys get aggressive quickly.
Friendship Bracelet Scam More common in western Europe, you're approached by someone selling bracelets. They quickly wrap a loop of fabric around your finger and pull it tight, starting to quickly weave a bracelet. The only way to (easily) get it off your hand is to pay. Leftover sales
This scam involves many different items, but the idea is usually the same: you are approached by someone who claims to have a large amount of excess inventory and offers to sell it to you at a great price. The scammer actually has low quality items and will lie to you about the price/origin of the items.
Dent repair scams
Scammers will approach you in public about a dent in your car and offer to fix it for a low price. Often they will claim that they are mechanics. They will not fix the dent in your car, but they will apply large amounts of wax or other substances to hide the dent while they claim that the substance requires time to harden.
Gold ring/jewelry/valuable item scam
A scammer will "find" a gold ring or other valuable item and offers to sell it to you. The item is fake and you will never see the scammer again.
Distraction theft
One person will approach you and distract you, while their accomplice picks your pockets. The distraction can take many forms, but if you are a tourist and are approached in public, watch closely for people getting close to you.

General resources

Site to report scams in the United Kingdom: http://www.actionfraud.police.uk/
Site to report scams in the United States: https://www.ic3.gov/default.aspx
Site to report scams in Canada: www.antifraudcentre-centreantifraude.ca/reportincident-signalerincident/index-eng.htm
Site to report scams in Europe: https://www.europol.europa.eu/report-a-crime/report-cybercrime-online
FTC scam alerts: https://www.consumer.ftc.gov/scam-alerts
Microsoft's anti-scam guide: https://www.microsoft.com/en-us/safety/online-privacy/avoid-phone-scams.aspx
https://www.usa.gov/common-scams-frauds
https://www.usa.gov/scams-and-frauds
https://www.consumer.ftc.gov/features/scam-alerts
https://www.fbi.gov/scams-and-safety/common-fraud-schemes
submitted by EugeneBYMCMB to Scams [link] [comments]

Major Spanish Banks Launch Blockchain Proof-Of-Concept For Interbank Payments

Major Spanish Banks Launch Blockchain Proof-Of-Concept For Interbank Payments

The Involved Spanish Banking Institutions Partnered With The Payments Provider Iberpay
Five of Spain’s largest banks - Banco Sabadell, Banco Santander, Bankia, BBVA and CaixaBank, completed a proof-of-concept (POC) for interbank payments and settlements, based on blockchain technology. The POC was conducted in partnership with Iberpay, which connected the blockchain network to its payment system.
Currently, Iberpay manages Spain’s automated clearing system, dubbed National Electronic Clearing System (SNCE), which made processing and settlement of transactions for bank accounts of all Spanish banks possible. The system was first introduced in 1987, with Banco de España initially being assigned to manage the SNCE.
The new blockchain network allows for the SNCE system to be integrated within the ecosystem and facilitate instant credit transfers via smart contracts. The process of generating smart contracts is automated and managed by a set of criteria, which a credit transfer needs to facilitate. For example, a pre-set smart contract can be used for confirmation of shipped goods, or a contract signing.
As a direct result of the partnership, a brand new blockchain network was released, dubbed Red-I. The network would act as a medium for creating banking services, running on a DLT ledger. The Red-I network is currently in its test phase, with 7 banks running trials with fully-operational nodes.
During the POC stage, the new network made over 20,000 instant credit transfers, with a timeframe for processing and settlement of a transfer of just 2.5 seconds on average. Red-I also shortened the time for issuing, registering, executing, and canceling customer bank guarantees via the automation and deployment of smart contracts.
“This initiative has confirmed the viability of employing blockchain technology to the payments sector,” bank officials announced.
The POC was legally supported and advised by Grant Thornton – a large-scale accounting company, working in the United States. The accounting company put the new blockchain system under an “exhaustive evaluation” of the legal aspects, concerning blockchain payments.
Тhe banks’ efforts would not stop only by developing and deploying the system in real life. Bank officials noted that after the successful POC, the Spanish banks will now explore “a second scope”, including the creation of a bridge between Red-I and other networks, whether It will be non-banking or mixed networks.
In order to do so, the new system must be routed to Iberpay’s API for even improved and quicker streamlined credit transfers.
Meanwhile, researchers from the University of New South Wales, University of Hong Kong, and Universite du Luxembourg highlighted the importance of advancements in the banking sector, especially after the COVID-19 virus outbreak. The researchers further explored the connection between Bitcoin, Facebook’s Libra stablecoin project, China’s DC/EP digital Yuan, and the regulatory misunderstandings, regarding cryptocurrencies.
“We argue most central banks should focus not on rolling out novel new forms of blockchain-based money but rather on transforming their payment systems: this is where the real benefits will lie both in the [COVID-19] crisis and beyond”, the researchers stated.
submitted by Crypto_Browser to CryptoBrowser_EN [link] [comments]

Review and Prospect of Crypto Economy-Development and Evolution of Consensus Mechanism (2)

Review and Prospect of Crypto Economy-Development and Evolution of Consensus Mechanism (2)

https://preview.redd.it/a51zsja94db51.png?width=567&format=png&auto=webp&s=99e8080c9e9b1fb5e11cbd70f915f9cb37188f81
Foreword
The consensus mechanism is one of the important elements of the blockchain and the core rule of the normal operation of the distributed ledger. It is mainly used to solve the trust problem between people and determine who is responsible for generating new blocks and maintaining the effective unification of the system in the blockchain system. Thus, it has become an everlasting research hot topic in blockchain.
This article starts with the concept and role of the consensus mechanism. First, it enables the reader to have a preliminary understanding of the consensus mechanism as a whole; then starting with the two armies and the Byzantine general problem, the evolution of the consensus mechanism is introduced in the order of the time when the consensus mechanism is proposed; Then, it briefly introduces the current mainstream consensus mechanism from three aspects of concept, working principle and representative project, and compares the advantages and disadvantages of the mainstream consensus mechanism; finally, it gives suggestions on how to choose a consensus mechanism for blockchain projects and pointed out the possibility of the future development of the consensus mechanism.
Contents
First, concept and function of the consensus mechanism
1.1 Concept: The core rules for the normal operation of distributed ledgers
1.2 Role: Solve the trust problem and decide the generation and maintenance of new blocks
1.2.1 Used to solve the trust problem between people
1.2.2 Used to decide who is responsible for generating new blocks and maintaining effective unity in the blockchain system
1.3 Mainstream model of consensus algorithm
Second, the origin of the consensus mechanism
2.1 The two armies and the Byzantine generals
2.1.1 The two armies problem
2.1.2 The Byzantine generals problem
2.2 Development history of consensus mechanism
2.2.1 Classification of consensus mechanism
2.2.2 Development frontier of consensus mechanism
Third, Common Consensus System
Fourth, Selection of consensus mechanism and summary of current situation
4.1 How to choose a consensus mechanism that suits you
4.1.1 Determine whether the final result is important
4.1.2 Determine how fast the application process needs to be
4.1.2 Determining the degree to which the application requires for decentralization
4.1.3 Determine whether the system can be terminated
4.1.4 Select a suitable consensus algorithm after weighing the advantages and disadvantages
4.2 Future development of consensus mechanism
Last lecture review: Chapter 1 Concept and Function of Consensus Mechanism plus Chapter 2 Origin of Consensus Mechanism
Chapter 3 Common Consensus Mechanisms (Part 1)
Figure 6 Summary of relatively mainstream consensus mechanisms
📷
https://preview.redd.it/9r7q3xra4db51.png?width=567&format=png&auto=webp&s=bae5554a596feaac948fae22dffafee98c4318a7
Source: Hasib Anwar, "Consensus Algorithms: The Root Of The Blockchain Technology"
The picture above shows 14 relatively mainstream consensus mechanisms summarized by a geek Hasib Anwar, including PoW (Proof of Work), PoS (Proof of Stake), DPoS (Delegated Proof of Stake), LPoS (Lease Proof of Stake), PoET ( Proof of Elapsed Time), PBFT (Practical Byzantine Fault Tolerance), SBFT (Simple Byzantine Fault Tolerance), DBFT (Delegated Byzantine Fault Tolerance), DAG (Directed Acyclic Graph), Proof-of-Activity (Proof of Activity), Proof-of- Importance (Proof of Importance), Proof-of-Capacity (Proof of Capacity), Proof-of-Burn ( Proof of Burn), Proof-of-Weight (Proof of Weight).
Next, we will mainly introduce and analyze the top ten consensus mechanisms of the current blockchain.
》POW
-Concept:
Work proof mechanism. That is, the proof of work means that it takes a certain amount of computer time to confirm the work.
-Principle:
Figure 7 PoW work proof principle
📷
https://preview.redd.it/xupacdfc4db51.png?width=554&format=png&auto=webp&s=3b6994641f5890804d93dfed9ecfd29308c8e0cc
The PoW represented by Bitcoin uses the SHA-256 algorithm function, which is a 256-bit hash algorithm in the password hash function family:
Proof of work output = SHA256 (SHA256 (block header));
if (output of proof of work if (output of proof of work >= target value), change the random number, recursive i logic, continue to compare with the target value.
New difficulty value = old difficulty value* (time spent by last 2016 blocks /20160 minutes)
Target value = maximum target value / difficulty value
The maximum target value is a fixed number. If the last 2016 blocks took less than 20160 minutes, then this coefficient will be small, and the target value will be adjusted bigger, if not, the target value will be adjusted smaller. Bitcoin mining difficulty and block generation speed will be inversely proportional to the appropriate adjustment of block generation speed.
-Representative applications: BTC, etc.
》POS
-Concept:
Proof of stake. That is, a mechanism for reaching consensus based on the holding currency. The longer the currency is held, the greater the probability of getting a reward.
-Principle:
PoS implementation algorithm formula: hash(block_header) = Coin age calculation formula: coinage = number of coins * remaining usage time of coins
Among them, coinage means coin age, which means that the older the coin age, the easier it is to get answers. The calculation of the coin age is obtained by multiplying the coins owned by the miner by the remaining usage time of each coin, which also means that the more coins you have, the easier it is to get answers. In this way, pos solves the problem of wasting resources in pow, and miners cannot own 51% coins from the entire network, so it also solves the problem of 51% attacks.
-Representative applications: ETH, etc.
》DPoS
-Concept:
Delegated proof of stake. That is, currency holding investors select super nodes by voting to operate the entire network , similar to the people's congress system.
-Principle:
The DPOS algorithm is divided into two parts. Elect a group of block producers and schedule production.
Election: Only permanent nodes with the right to be elected can be elected, and ultimately only the top N witnesses can be elected. These N individuals must obtain more than 50% of the votes to be successfully elected. In addition, this list will be re-elected at regular intervals.
Scheduled production: Under normal circumstances, block producers take turns to generate a block every 3 seconds. Assuming that no producer misses his order, then the chain they produce is bound to be the longest chain. When a witness produces a block, a block needs to be generated every 2s. If the specified time is exceeded, the current witness will lose the right to produce and the right will be transferred to the next witness. Then the witness is not only unpaid, but also may lose his identity.
-Representative applications: EOS, etc.
》DPoW
-Concept:
Delayed proof of work. A new-generation consensus mechanism based on PoB and DPoS. Miners use their own computing power, through the hash algorithm, and finally prove their work, get the corresponding wood, wood is not tradable. After the wood has accumulated to a certain amount, you can go to the burning site to burn the wood. This can achieve a balance between computing power and mining rights.
-Principle:
In the DPoW-based blockchain, miners are no longer rewarded tokens, but "wood" that can be burned, burning wood. Miners use their own computing power, through the hash algorithm, and finally prove their work, get the corresponding wood, wood is not tradable. After the wood has accumulated to a certain amount, you can go to the burning site to burn the wood. Through a set of algorithms, people who burn more wood or BP or a group of BP can obtain the right to generate blocks in the next event segment, and get rewards (tokens) after successful block generation. Since more than one person may burn wood in a time period, the probability of producing blocks in the next time period is determined by the amount of wood burned by oneself. The more it is burned, the higher the probability of obtaining block rights in the next period.
Two node types: notary node and normal node.
The 64 notary nodes are elected by the stakeholders of the dPoW blockchain, and the notarized confirmed blocks can be added from the dPoW blockchain to the attached PoW blockchain. Once a block is added, the hash value of the block will be added to the Bitcoin transaction signed by 33 notary nodes, and a hash will be created to the dPow block record of the Bitcoin blockchain. This record has been notarized by most notary nodes in the network. In order to avoid wars on mining between notary nodes, and thereby reduce the efficiency of the network, Komodo designed a mining method that uses a polling mechanism. This method has two operating modes. In the "No Notary" (No Notary) mode, all network nodes can participate in mining, which is similar to the traditional PoW consensus mechanism. In the "Notaries Active" mode, network notaries use a significantly reduced network difficulty rate to mine. In the "Notary Public Activation" mode, each notary public is allowed to mine a block with its current difficulty, while other notary public nodes must use 10 times the difficulty of mining, and all normal nodes use 100 times the difficulty of the notary public node.
Figure 8 DPoW operation process without a notary node
📷
https://preview.redd.it/3yuzpemd4db51.png?width=500&format=png&auto=webp&s=f3bc2a1c97b13cb861414d3eb23a312b42ea6547
-Representative applications: CelesOS, Komodo, etc.
CelesOS Research Institute丨DPoW consensus mechanism-combustible mining and voting
》PBFT
-Concept:
Practical Byzantine fault tolerance algorithm. That is, the complexity of the algorithm is reduced from exponential to polynomial level, making the Byzantine fault-tolerant algorithm feasible in practical system applications.
-Principle:
Figure 9 PBFT algorithm principle
📷
https://preview.redd.it/8as7rgre4db51.png?width=567&format=png&auto=webp&s=372be730af428f991375146efedd5315926af1ca
First, the client sends a request to the master node to call the service operation, and then the master node broadcasts other copies of the request. All copies execute the request and send the result back to the client. The client needs to wait for f+1 different replica nodes to return the same result as the final result of the entire operation.
Two qualifications: 1. All nodes must be deterministic. That is to say, the results of the operation must be the same under the same conditions and parameters. 2. All nodes must start from the same status. Under these two limited qualifications, even if there are failed replica nodes, the PBFT algorithm agrees on the total order of execution of all non-failed replica nodes, thereby ensuring security.
-Representative applications: Tendermint Consensus, etc.
Next Lecture: Chapter 3 Common Consensus Mechanisms (Part 2) + Chapter 4 Consensus Mechanism Selection and Status Summary
CelesOS
As the first DPOW financial blockchain operating system, CelesOS adopts consensus mechanism 3.0 to break through the "impossible triangle", which can provide high TPS while also allowing for decentralization. Committed to creating a financial blockchain operating system that embraces supervision, providing services for financial institutions and the development of applications on the supervision chain, and formulating a role and consensus ecological supervision layer agreement for supervision.
The CelesOS team is dedicated to building a bridge between blockchain and regulatory agencies/financial industry. We believe that only blockchain technology that cooperates with regulators will have a real future. We believe in and contribute to achieving this goal.

📷Website
https://www.celesos.com/
📷 Telegram
https://t.me/celeschain
📷 Twitter
https://twitter.com/CelesChain
📷 Reddit
https://www.reddit.com/useCelesOS
📷 Medium
https://medium.com/@celesos
📷 Facebook
https://www.facebook.com/CelesOS1
📷 Youtube
https://www.youtube.com/channel/UC1Xsd8wU957D-R8RQVZPfGA
submitted by CelesOS to u/CelesOS [link] [comments]

Review and Prospect of Crypto Economy-Development and Evolution of Consensus Mechanism (1)

Review and Prospect of Crypto Economy-Development and Evolution of Consensus Mechanism (1)

https://preview.redd.it/7skleasc80a51.png?width=553&format=png&auto=webp&s=fc18cee10bff7b65d5b02487885d936d23382fc8
Table 1 Classification of consensus system
Source: Yuan Yong, Ni Xiaochun, Zeng Shuai, Wang Feiyue, "Development Status and Prospect of Blockchain Consensus Algorithm"
Figure 4 Evolution of consensus algorithm

Figure 4 Evolution of consensus algorithm
Source: Network data

Foreword
The consensus mechanism is one of the important elements of the blockchain and the core rule of the normal operation of the distributed ledger. It is mainly used to solve the trust problem between people and determine who is responsible for generating new blocks and maintaining the effective unification of the system in the blockchain system. Thus, it has become an everlasting research hot topic in blockchain.
This article starts with the concept and role of the consensus mechanism. First, it enables the reader to have a preliminary understanding of the consensus mechanism as a whole; then starting with the two armies and the Byzantine general problem, the evolution of the consensus mechanism is introduced in the order of the time when the consensus mechanism is proposed; Then, it briefly introduces the current mainstream consensus mechanism from three aspects of concept, working principle and representative project, and compares the advantages and disadvantages of the mainstream consensus mechanism; finally, it gives suggestions on how to choose a consensus mechanism for blockchain projects and pointed out the possibility of the future development of the consensus mechanism.
Contents
First, concept and function of the consensus mechanism
1.1 Concept: The core rules for the normal operation of distributed ledgers
1.2 Role: Solve the trust problem and decide the generation and maintenance of new blocks
1.2.1 Used to solve the trust problem between people
1.2.2 Used to decide who is responsible for generating new blocks and maintaining effective unity in the blockchain system
1.3 Mainstream model of consensus algorithm
Second, the origin of the consensus mechanism
2.1 The two armies and the Byzantine generals
2.1.1 The two armies problem
2.1.2 The Byzantine generals problem
2.2 Development history of consensus mechanism
2.2.1 Classification of consensus mechanism
2.2.2 Development frontier of consensus mechanism
Third, Common Consensus System
Fourth, Selection of consensus mechanism and summary of current situation
4.1 How to choose a consensus mechanism that suits you
4.1.1 Determine whether the final result is important
4.1.2 Determine how fast the application process needs to be
4.1.2 Determining the degree to which the application requires for decentralization
4.1.3 Determine whether the system can be terminated
4.1.4 Select a suitable consensus algorithm after weighing the advantages and disadvantages
4.2 Future development of consensus mechanism
Chapter 1 Concept and Function of Consensus Mechanism
1.1 Concept: The core rules for the normal operation of distributed ledgers
Since most cryptocurrencies use decentralized blockchain design, nodes are scattered and parallel everywhere, so a system must be designed to maintain the order and fairness of the system's operation, unify the version of the blockchain, and reward users maintaining the blockchain and punish malicious harmers. Such a system must rely on some way to prove that who has obtained the packaging rights (or accounting rights) of a blockchain and can obtain the reward for packaging this block; or who intends to harm , and will receive certain penalty. Such system is consensus mechanism.
1.2 Role: Solve the trust problem and decide the generation and maintenance of new blocks
1.2.1 Used to solve the trust problem between people
The reason why the consensus mechanism can be at the core of the blockchain technology is that it has formulated a set of rules from the perspective of cryptographic technologies such as asymmetric encryption and time stamping. All participants must comply with this rules. And theese rules are transparent, and cannot be modified artificially. Therefore, without the endorsement of a third-party authority, it can also mobilize nodes across the network to jointly monitor, record all transactions, and publish them in the form of codes, effectively achieving valuable information transfer, solving or more precisely, greatly improving the trust problem between two unrelated strangers who do not trust each other. After all, trusting the objective technology is less risky than trusting a subjective individual.
1.2.2 Used to decide who is responsible for generating new blocks and maintaining effective unity in the blockchain system
On the other hand, in the blockchain system, due to the high network latency of the peer-to-peer network, the sequence of transactions observed by each node is different. To solve this, the consensus mechanism can be used to reach consensus on transactions order within a short period of time to decide who is responsible for generating new blocks in the blockchain system, and to maintain the effective unity of the blockchain.
1.3 The mainstream model of consensus algorithm
The blockchain system is built on the P2P network, and the set of all nodes can be recorded as PP, generally divided into ordinary nodes that produce data or transactions, and"miner" nodes (denoted as M) responsible for mining operations, like verifying, packaging, and updating the data generated by ordinary nodes or transactions. The functions of the two types of nodes may be overlapped; miner nodes usually participate in the consensus competition process in general, and will select certain representative nodes and replace them to participant in the consensus process and compete for accounting rights in specific algorithms. The collection of these representative nodes is recorded as DD; the accounting nodes selected through the consensus process are recorded as AA. The consensus process is repeated in accordance with the round, and each round of the consensus process generally reselects the accounting node for the round . The core of the consensus process is the "select leader" and "accounting" two parts. In the specific operation process, each round can be divided into four stages: Leader election, Block generation, Data validation and Chain updating namely accounting). As shown in Figure 1, the input of the consensus process is the transaction or data generated and verified by the data node, and the output is the encapsulated data block and updated blockchain. The four stages are executed repeatedly, and each execution round will generate a new block.
Stage 1: Leader election
The election is the core of the consensus process, that is, the process of selecting the accounting node AA from all the miner node sets MM: we can use the formula f(M)→f(M)→AA to represent the election process, where the function ff represents the specific implementation of the consensus algorithm. Generally speaking, |A|=1,|A|=1, that is, the only miner node is finally selected to keep accounts.
Stage 2: Block generation
The accounting node selected in the first stage packages the transactions or data generated by all nodes PP in the current time period into a block according to a specific strategy, and broadcasts the generated new block to all miner nodes MM or their representative nodes DD. These transactions or data are usually sorted according to various factors such as block capacity, transaction fees, transaction waiting time, etc., and then packaged into new blocks in sequence. The block generation strategy is a key factor in the performance of the blockchain system, and it also exposes the strategic behavior of miners such as greedy transactions packaging and selfish mining.
Stage 3: Verification
After receiving the broadcasted new block, the miner node MM or the representative node DD will verify the correctness and rationality of the transactions or data encapsulated in the block. If the new block is approved by most verification/representative nodes, the block will be updated to the blockchain as the next block.
Stage 4: On-Chain
The accounting node adds new blocks to the main chain to form a complete and longer chain from the genesis block to the latest block. If there are multiple fork chains on the main chain, the main chain needs to be based on the consensus algorithm judging criteria to choose one of the appropriate fork chain as the main chain.
Chapter 2 The Origin of Consensus Mechanism
2.1 The two armies problems and the Byzantium generals problem
2.1.1 The two armies


Figure 2 Schematic diagram of the two armed forces
Selected from Yuan Yong, Ni Xiaochun, Zeng Shuai, Wang Feiyue, "Development Status and Prospect of Blockchain Consensus Algorithm", Journal of Automation, 2018, 44(11): 2011-2022
As shown in the figure, the 1st and 2nd units of the Blue Army are stationed on two sides of the slope, and cannot communicate remotely between each other. While the White Army is just stationed in the middle of the two Blue Army units. Suppose that the White Army is stronger than either of the two Blue Army units, but it is not as strong as the two Blue Army units combined. If the two units of the Blue Army want to jointly attack the White Army at the same time, they need to communicate with each other, but the White Army is stationed in the middle of them. It is impossible to confirm whether the messengers of two Blue Army units have sent the attack signal to each other, let alone the tampering of the messages. In this case, due to the inability to fully confirm with each other, ultimately no effective consensus can be reached between the two Blue Army units, rendering the "paradox of the two armies".
2.1.2 The Byzantine generals problem


Figure 3 Diagram of the Byzantine generals' problem
Due to the vast territory of the Byzantine roman empire at that time, in order to better achieve the purpose of defense, troops were scattered around the empire, and each army was far apart, and only messengers could deliver messages. During the war, all generals must reach an agreement, or decide whether to attack the enemy based on the majority principle. However, since it is completely dependent on people, if there is a situation where the general rebels or the messenger delivers the wrong message, how can it ensure that the loyal generals can reach agreement without being influenced by the rebels is a problem which was called the Byzantine problem.
The two armies problems and the Byzantine generals problem are all elaborating the same problem: in the case of unreliable information exchange, it is very difficult to reach consensus and coordinate action. The Byzantine general problem is more like a generalization of the "paradox of the two armies".
From the perspective of the computer network, the two armies problem and the Byzantine problem are common contents of computer network courses: the direct communication between two nodes on the network may fail, so the TCP protocol cannot completely guarantee the consistence between the two terminal networks. However, the consensus mechanism can use economic incentives and other methods to reduce this uncertainty to a level acceptable to most people.
It is precisely because of the two armies problem and the Byzantine problem that the consensus mechanism has begun to show its value.
2.2 Development history of consensus mechanism
2.2.1 Classification of consensus mechanism
Because different types of blockchain projects have different requirements for information recording and block generation, and as the consensus mechanism improves due to the development of blockchain technology, there are currently more than 30 consensus mechanisms. These consensus mechanisms can be divided into two categories according to their Byzantine fault tolerance performance: Byzantine fault tolerance system and non-Byzantine fault tolerance system.

Table 1 Classification of consensus mechanism
Source: Yuan Yong, Ni Xiaochun, Zeng Shuai, Wang Feiyue, "Development Status and Prospect of Blockchain Consensus Algorithm"
2.2.2 Development frontier of consensus mechanism
-Development of consensus algorithm
According to the proposed time of the consensus algorithm, we can see relatively clearly the development of the consensus algorithm.
Source: Network data

Figure 4 Development frontier of consensus algorithm

Figure 5 Historical evolution of blockchain consensus algorithm
Source: Yuan Yong, Ni Xiaochun, Zeng Shuai, Wang Feiyue, "Development Status and Prospect of Blockchain Consensus Algorithm"
The consensus algorithm has laid the foundation for the blockchain consensus mechanism. Initially, the research of consensus algorithms was mainly used by computer scientists and computer professors to improve the spam problem or conduct academic discussions.
For example, in 1993, American computer scientist and Harvard professor Cynthia Dwork first proposed the idea of proof of work in order to solve the spam problem; in 1997, the British cryptographer Adam Back also independently proposed to solve the spam problem by use of the mechanism of proof of work for hashing cash and published officially in 2002; in 1999, Markus Jakobsson officially proposed the concept of "proof of work", which laid the foundation for the subsequent design of Satoshi Nakamoto's Bitcoin consensus mechanism.
Next lecture: Chapter 3 Detailed Explanation of Consensus Mechanism Technology
CelesOS
As the first DPOW financial blockchain operating system, CelesOS adopts consensus mechanism 3.0 to break through the "impossible triangle". It provides both high TPS and decentralization. Committed to creating a financial blockchain operating system that embraces regulation, providing services for financial institutions and the development of applications on the regulation chain, and developing a role and consensus eco-system regulation level agreement for regulation.
The CelesOS team is committed to building a bridge between blockchain and regulatory agencies / finance industry. We believe that only blockchain technology that cooperates with regulators will have a bright future and strive to achieve this goal.
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https://www.celesos.com/
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https://t.me/celeschain
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https://twitter.com/CelesChain
📷 Reddit
https://www.reddit.com/useCelesOS
📷 Medium
https://medium.com/@celesos
📷 Facebook
https://www.facebook.com/CelesOS1
📷 Youtube
https://www.youtube.com/channel/UC1Xsd8wU957D-R8RQVZPfGA
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Ethereum 2.0: Why, How And Then?

Ethereum 2.0: Why, How And Then?
Why update Ethereum? One problem of the Ethereum network that the update should solve is scalability. At the moment, its blockchain can perform to 15 transactions per second, which is over two times more than that of bitcoin. However, this speed is still not enough for a large number of users. For example, the Visa payment system can perform up to 24 thousand transactions per second.
Adding an Optimistic Rollup technology will help to solve the scalability problem. According to Vitalik Buterin, the creator of Ethereum, its implementation will occur after the network’s update and will increase its throughput to 1000 transactions per second.
by StealthEX
Another solution to this problem is a change in the algorithm. Currently, Ethereum runs on the same protocol as Bitcoin, Proof-of-Work, confirmation of transactions in the cryptocurrency network occurs using the computing power of processors.
Using the Proof-of-Work algorithm limits the growth of the Ethereum network bandwidth. To withstand a large load, more miners are needed, but the growth of their number slows down since it becomes more difficult to mine cryptocurrency and, consequently, less profitable.
This is the reason the Ethereum development team is planning to switch to the Proof-of-Stake algorithm. Unlike the PoW, it does not require the use of computing power to confirm blocks. Instead of miners, transactions will be confirmed by validators. To become a validator, the user should have 32 ETH and install a special client. From a technical point of view, this is easier than buying mining devices and maintaining their functionality, as well as looking for access to cheap electricity. Thus, the system will no longer need expensive hardware.
The main solution to the scalability problem will be to implement sharding. Current Ethereum network is a unified database. After the update, the blockchain will be divided into autonomous, interacting blocks — shards, each of which will process particular transactions and smart contracts, which, however, will be recognized by the entire Ethereum blockchain. Nodes that form the shard process information separately, this allows maintaining the principle of decentralization. This is important since the risk of centralization is another big problem of the old algorithm.
Since the complexity of mining has increased over time, and now this process requires having expensive equipment and access to cheap electricity, small participants can not afford to stay in the game. In such conditions, big pools of miners that can provide higher productivity have a decisive advantage. For example, in April, more than 50% of the computing power of the Ethereum network was provided by only two mining pools. This creates a significant risk of centralization and “51% attacks”.
Validators will confirm transactions and get rewards in the form of passive income. According to the project’s roadmap, this amount will vary from 1.81% to 18.1%. The profitability of the stacking will depend on the number of validators. The more of them, the smaller the amount they get. However, there will be some costs. In the same Ethereum 2.0 roadmap, developers mentioned that the cost of validating transactions, based on rough calculations, will be about $180 per year. One of the developers of the project, Justin Drake, predicts that on average the validator will receive an income of 5% per year.

What is the estimated Ethereum 2.0 release date?

The launch of Ethereum 2.0 will take place gradually, in six stages, the “zero” of which is expected this summer. However, it is worth noting that due to finding vulnerabilities, the dates have already been shifted several times–initially, the transition to the new version was planned in 2019.
One of the developers of the project, Afri Schoedon, said that the launch could be postponed to 2021. According to him, under favourable circumstances, the main network can be presented in November of this year, but there are certain difficulties in this.
Schoedon explained that before launching ETH 2.0, all of its clients must be brought to the same specifications. After that, the developer’s team needs to open a unified deposit contract so that users can transfer their assets from the old chain to the new one. Between these stages, developers also need additional time, so they could test all aspects of the new system.
As it usually happens, there’s going to be two parallel blockchains as a result of the hard fork. The first one, ETH1, will continue to work using an old protocol, while the update will be implemented on ETH2. Users will be able to transfer their coins from the old blockchain to the new one, but not vice versa. The appearance of sharding will allow developers to move to phase 1.5 — during this phase, ETH1 will merge with ETH2, becoming one of the 64 “shards” of the updated blockchain. In the second phase, smart contracts become available on ETH2, which can be considered the full start of its economic activity.

And what are expectations?

Updating the Ethereum network will increase its technical capabilities, namely, it will speed up and reduce the cost of transactions, as well as make the blockchain less vulnerable for centralization process.
Currently, the absolute majority of decentralized finance projects are developed using the Ethereum platform. The Ethereum 2.0 release will probably attract even more partners who will use the blockchain for their projects.
Ryan Watkins, Messari Analysis company’s researcher, highly values the importance of updating.
“ETH 2.0 is a much stronger catalyst than the Bitcoin halving simply because it’s an uncertain and fundamental change.” — Ryan Watkins wrote on his Twitter account
And the part about uncertainty is hard to disagree with. Of course, there are some concerns about the bright Ethereum future. The coming hard fork carries with it potential negative consequences. For example, after switching to the PoS algorithm, the US Securities and Exchange Commission (SEC) may well admit Ethereum as a security, which will lead to legal complications similar to those faced by Pavel Durov when trying to launch his TON blockchain platform.
For now, ETH is the most popular coin for mining at home, and most of these miners will probably just leave the network.
There is also a risk that the price of Ethereum may fall. To receive passive income for storing ETH, the user will not only need to have 32 coins but also block them through a special transaction. They will not be able to withdraw these blocked funds immediately. As stated in the project roadmap, the cryptocurrency withdrawal process will take at least 18 hours. This could take even more time if many users request the return of tokens at the same time. Thus, if ETH falls in price, it will be impossible to sell it immediately, and there is a risk of losing some capital and all the income received from stacking.
Nevertheless, investors are mostly optimistic — the volume of Ethereum options on the Deribit exchange has grown to a historical high, which indicates confidence in the future of Ethereum project. The ETH price is also growing, having overcome the consequences of the March collapse of cryptocurrencies.
Most experts agree that Ethereum price will grow after the update. On the one hand, the altcoin will become more expensive, as it will become a more attractive investment. On the other hand, the offer will decrease, as users will start transferring coins from the first version of the network to the second, to block them for passive income.
If you want to participate in the future fate of the ETH project, you can buy Ethereum using our service. We provide fast, anonymous and limitless swaps between over 250 cryptocurrencies. Just go to StealthEX and follow these easy steps:
✔ Choose the pair and the amount for your exchange. For example BTC to ETH.
✔ Press the “Start exchange” button.
✔ Provide the recipient address to which the coins will be transferred.
✔ Move your cryptocurrency for the exchange.
✔ Receive your coins.
Follow us on Medium, Twitter, Facebook, and Reddit to get StealthEX.io updates and the latest news about the crypto world. For all requests message us via [[email protected]](mailto:[email protected]).
The views and opinions expressed here are solely those of the author. Every investment and trading move involves risk. You should conduct your own research when making a decision.
Original article was posted on https://stealthex.io/blog/2020/06/30/ethereum-2-0-why-how-and-then/.
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Some informative responses from Colin and Andy from the just-concluded Nano AMA at the Atomic Wallet Telegram group

The AMA ran today from 13:00 - 14:20 UTC, with Colin and Andy. I've copied over some of their responses that I found give me better insight into Nano. Their responses are in italics. Responses to different questions are separated by double spaces. Colin's responses are listed first, followed by Andy's. Sorry I couldn't copy over the questions as well. I've added my comments in places.
From Colin:
PoW coins have done a good marketing that the energy expenditure makes your coins more secure but it’s really unnecessory. PoW coins need to continue expending work because if they stop, their security parameter erodes.
Nano has no such problem, once an election for a transaction is complete, it’s confirmed. If it sits there it stays confirmed and it doesn’t need any extra effort. Wow, put that way, Bitcoin seems unsustainable in the long term when there is an alternative like Nano.

Yes the circulating supply is forever like this. The reason it can’t change is because nano transactions can only send your current balance or less to someone else, this means new coins can never be injected in to the system. Interesting design reason new Nano can't be minted.

Volatility is a focus with all cryptocurrencies and it comes from low volume, it’s not intrinsic to cryptocurrency itself. To cure low volume our focus is integrating it in to parts of the economy where it solves a problem, rather than just emulating credit cards etc.
Not having fees in the network puts us in a very good position for buying beer, for example. Typically credit card providers will charge 2-5% for a purchase, maybe even more, and it tight margin businesses that make 2-5% profit anyway, this is huge. A lot of Reddit discussion on crypto adoption considers only user experience and overlooks benefits to merchants.

Nano is purpose built to be the fastest and most decentralized currency around. Our transactions settle in less than 1 second and it’s all done on a network with no fees, and a tiny environmental footprint
Decentralization is an essential focus for us, many other cryptocurrencies can get fast or low cost, but they can’t also maintain decentralization which I think we do very well.
Well the sustainability comes from 2 main parts. We have a laser sharp focus on being the most efficient currency. This means our development stays focused and eventually the amount of things going in to the code base will trend downward; once we’ve achieved the goal we just have to make things more efficient.
The second part of sustainability is our Open Representative Voting which is our replacement for PoW mining. We saw the energy expenditure as something that would come in conflict with any system that would attain high adoption so our goal was to get the same or better decentralization benefits and also have a low energy footprint. We think we achieved that goal as our representatives are all over the world under many different organizations. A healthy decentralized representative set is good for long term sustainability.

And on the simplicity, nano is probably one of the easiest cryptocurrencies to use. There are no fees to calculate, the UX impact of entering a fee is greatly understated. How much should the fee be? Does my grandma know what network load is? What does it mean with respect to fee?
Nano simply has accounts and balances, you send and it lands in their wallet in less than a second, nothing can be simpler.

We’re not looking to expand in to defi right now. I have some reservations about it’s viability. One thing I’ve noticed in my many years of seeing technology evolution is to not try and change 2 things at once. We don’t want to simultaneously change the currency people use and also change how finances are done. First change the currency, then change the finances.
I think Libra suffers from a market mis-assesment. Essentially what they’re claiming is be a multi-currency bank account for every facebook user. Getting users electronic bank accounts isn’t a technology problem, it’s a regulatory and logistics problem. Since Facebook is essentially being a bank for people, they’re going to be required to comply with KYC requirements. Sending/receiving isn’t going to be open as it is in cryptocurrency because of AML requirements. People are not going to have access to the system in remote areas because how do they deposit or more importantly withdraw local currency from their Libra accounts.
I think privacy is a big concern with our transactions and credit card purchases and it’s only getting worse. Letting Facebook/Libra know all your purchase history I think is a huge mistake.
I think it also doesn’t fundamentally solve the central banking problem where they can print more money and inflate the currency supply. I see this behavior as a fundamentally unethical thing that cryptocurrency solves and Libra is taking a huge step back on that.
I don’t see anything compelling about it and I don’t see long term viability.

I think disk usage is going to be a low concern long term. The goal with Nano is to be a widely used commercial grade currency so the representatives will be banks and other financial institutions, universities, and tech companies. Considering how much youtube, instagram, and other social media data is created each day, I don’t think the ledger size will be a long-term limiting factor. Looks like the role of hobbyists in running nodes will diminish with widening adoption.

Nano’s value is being the fastest, most efficient currency around. Entreprenuers make use of natural market incentives / natural efficiencies to make money on a business.
Cryptocurrency has distorted that term a bit with something more closely resembling subsidies. The transaction fees and block rewards are subsidizing the security parameter and processing prioritization. PoW chains need this subsidy because their security parameter costs a lot. Additionally we’ve seen miners work to limit the network’s throughput in order to rent-seek on the limited transaction space. Damn, talk about unaligned incentives between users and miners.
The people we’re looking for are the entreprenuers that know how to make use of a faster, lower cost currency.

Yes, having a fixed supply is an essential component of currency. If people can add more currency to the system, they’re taking value away from everyone else in that process. It’s unfair and unethical.
1 Nano actually can be divided down very small so there’s no risk of not having enough coins.

In this response, Colin is addressing a question about Steem and other dPoS systems. One major difference with Nano consensus is: having more Nano does not get you more Nano, there are no rewards for holding Nano. Holding nano doesn’t give people voting privledges on network changes, or any other centralizing component associated with holding.
Another big difference is voting in nano does not produce blocks, it chooses between conflicting blocks that a user publishes. If you don’t attempt to double-spend, your transactions cannot be voted against.

From Andy:
1. The faucet did indeed seed Nano's amazing international communities, and the contributions from around the world to the project have been unbelievable over that last 2.5 years. Communities are still active, engaged and building 💪
2. The effects of Nano being added to the Atomic Wallet (and other multi-currency wallets) is two fold. It increases the accessibility and convenience of storing Nano alongside other coins and also helps to disperse voting weight across a wider spread of representatives - increasing decentralization!

We certainly feel that Nano possesses far and away the best fundamentals, democratic approach to decentralization, and user experience.
Being fully distributed and operating on a the mainnet since 2015 is also very important, and puts Nano way ahead of many other projects making bold claims about future potential.
Nano is here today, and works as one would expect the digital money would!

Privacy is an attractive proposition to users of digital money for obvious reasons, it can be very important. Our position towards privacy is more conservative as we have seen many more hurdles to mainstream adoption being put in front of privacy-based projects.
With that being said, there are eyes towards the technical implications of introducing privacy, but it is extremely difficult to do this without incurring slowdowns to settlement times.
Throughout 2019 we were able to make significant progress in helping some of the more well-established cryptocurrency services such as exchanges, fiat gateways, payment platforms, and wallets- like Atomic 😄, to understand and integrate Nano. This proliferation of Nano across the space has ensured that it is increasingly more convenient for users and merchants to access and begin using Nano for payments.
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Blockchain in Healthcare – Webcast Q&A

Blockchain in Healthcare – Webcast Q&A
On our website, you can find the original article: https://block.co/webcastqa-blockchain-in-healthcare/
Block.co third webcast ” Blockchain in Healthcare: Bridging Trust in response to COVID-19“ received amazing feedback! We gathered some of the best experts in the field, Georgina Kyriakoudes, Ahmed Abdulla, Dimitri Neocleous, Dr. Alice Loveys to share their experience in the industry and discuss with us the latest updates in the sphere of Healthcare! In its third series of webcasts, Block.co gathered 253 people watching the event from 59 different countries, for a 90-minute webcast where guests answered participants’ questions.
Below is a list of the questions that were made and were not answered due to time constraints during the Blockchain in Healthcare webcast. Please note that the below information is only for educational purposes!
Question 1: I like what Dimitrios was saying regarding ownership and transfer. Health and social care have invested much in Information Management systems and processes. Transfer between NHS and social care is a typical block. Can you elaborate on how the blockchain sits across that – leapfrogs yet goes with the grain of what is already there in terms of shared records protocols, the exponentially growing types of professionals, pharmacists, careers, etc. that need early access to these records for better decision making.
Block.co Team Answer: Blockchain technology has the potential to improve healthcare, placing the patient at the center of the health care ecosystem, while providing security, privacy, and interoperability of health data. Blockchain could provide a new model for health information exchanges and transform electronic medical records to be more efficient, disintermediated, and secure. While it is not a cure, this new, Blockchain in Healthcare rapidly evolving field provides a sandbox for experimentation, investment, and proof-of-concept testing.
Healthcare systems around the world are preparing road maps that define critical policy and technical components needed for nationwide interoperability, including:
  • Ubiquitous, secure network infrastructure
  • Verifiable identity and authentication of all participants
  • Consistent illustration of authorization to access electronic health data, and several other requirements.
However, current technologies don’t totally address these necessities, and as a result, they face limitations associated with security, privacy, and full ecosystem interoperability.
Blockchain technology creates distinctive opportunities to scale back complexity, improve trustless collaboration, and create secure and immutable data. National Healthcare Systems need to track this rapidly evolving field to identify trends and sense the areas where government support may be needed for the technology to realize its full potential in health care. To form blockchain’s future, they ought to take into account mapping and gathering the blockchain ecosystem, establishing a blockchain framework to coordinate early-adopters, and supporting a pool for dialogue and discovery.
https://preview.redd.it/p17us55i6f851.png?width=800&format=png&auto=webp&s=80570ea170e78a728d69abb1602effeed1a50116
Question 2: What about the “compatibility” of blockchain solutions in healthcare with GDPR and/or other regulations about personal data protection.
Block.co Team Answer: The General Data Protection Regulation (GDPR), Europe’s new framework for data protection laws, has a vital impact on healthcare organizations. During this more and more patient-centric world where global healthcare organizations collect a large set of data on patients to produce improved health outcomes, this increased regulation has an even larger impact.
GDPR presents challenges across all industries and includes language that has a special impact on healthcare. The regulation defines “personal” data as “any information relating to an identified or identifiable natural person (data subject); an identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier such as a name, an identification number, location data, an online identifier or to one or more factors specific to the physical, physiological, genetic, mental, economic, cultural or social identity of that natural person.” On top of this definition, GDPR contains three extra, important definitions that pertain to health data:
  1. “Data concerning health” is defined by the GDPR as “personal data related to the physical or mental health of a natural person, including the provision of health care services, which reveal information about his or her health status.”
  2. “Genetic data” is outlined by the GDPR as “personal data relating to inherited or acquired genetic characteristics of a natural person which give unique information about the physiology or the health of that natural person and which result, in particular, from an analysis of a biological sample from the natural person in question.”
  3. “Biometric data” is “personal data resulting from specific technical processing relating to the physical, physiological, or behavioral characteristics of a natural person, which allows or confirms the unique identification of that natural person, such as facial images or dactyloscopic data.”
As described in Article 6 of GDPR, processing of personal data is considered lawful if: (1) the data subject has given consent; (2) it is necessary for the performance of a contract to which the data subject is a party; (3) it is necessary for compliance with a legal obligation; (4) it is necessary to protect the vital interest of the data subject or another natural person; (5) it is necessary for the performance of a task carried out in the public interest; (6) it is necessary for the purposes of the legitimate interests pursued by the controller or third party.
However, healthcare organizations that usually manage health data, have an added responsibility to take care of “data concerning health,” “genetic data,” and “biometric data” to a higher standard of protection than personal data, in general. GDPR prohibits the processing of these forms of health data unless one of the three conditions below would apply as per Article 9.
a. The data subject must have given “explicit consent.”
b. “Processing is necessary for the purposes of preventive or occupational medicine, for the assessment of the working capacity of the employee, medical diagnosis, the provision of health or social care or treatment or the management of health or social care systems and services …”
c. “Processing is necessary for reasons of public interest in the area of public health, such as protecting against serious cross-border threats to health or ensuring high standards of quality and safety of health care and of medicinal products or medical devices …”
Consent VS Explicit Consent – If one pays attention, there’s a difference in the GDPR’s health data use conditions (calls for “explicit consent”) and the general definition (calls for “consent”). Thus, there’s an ongoing debate as to what constitutes the difference between “unambiguous” and “explicit” consent. Despite the debate and the final legal clarifications, there is no doubt that in the purposes of the healthcare the “explicit consent” must have the strongest agreement form listing in detail the use(s) of data and covering the cases of data transfers and storage.
Question 3: How can we use blockchain technology by the government in Africanflavored government, say by Ministry of health to have patient autonomy of medical records that can be accessed by any government hospital irrespective of the ailment and record printed by the previous hospital and doctor, such as referral cases without having to open a new file in the referred hospital.
Block.co Team Answer: Perhaps that would be an ideal implementation of the Block.co solution issuing a digital certificate of medical examination on an Open Public Blockchain such as the Bitcoin blockchain, that would be decentralized in nature, easy to validate online without any special wallets, and would be provided by the patient on-demand, to refer to treatments received in other hospitals or areas. But this would require that the practitioner is aware and can use the open-source code or use Block.co services to issue these certificates. Alternatively, there could be the use of a wallet to store these medical credentials to be submitted on demand to health practitioners. Moreover, there would need to be an alignment of regulation in the matter as decentralized repositories are not recognized at the moment.

Question 4: Is there any data breach threat in the blockchain using a poorly protected private key at communication?
Block.co Team Answer: Millions of health care records have already been breached, and in attempts to combat this issue, solutions often result in the inaccessibility of health records. Health providers often send information to other providers, and this often ends up in mishandling of data, losing records, or passing on inaccurate and old data. In some cases, only one copy of an updated health record exists, and this may result in the loss of information. Health records often contain personal information such as names, social security numbers, and home addresses. When it comes to Blockchain in Healthcare, a poorly protected private key is always a factor to consider. A private key allows us to sign a transaction and spend funds residing in an address (public key) by providing ownership with the signature. It is a unique string of information that represents proof of identification inside the blockchain, which includes the right to access and control the participant’s wallet. It must be kept secret, as it is effectively a personal password. In the case that that private key is poorly protected, there is always a data breach threat.
Question 5: The medical record of a patient is owned by the patient. What happens if a doctor accesses the record without the consent of the patient? Using the smart contract, could there be a governing body, say a legal system that can call the doctor to order?
Block.co Team Answer: Rather than having each physical and electronic copies of records, blockchains may enable the shift to electronic health records (EHR). When looking at Blockchain in Healthcare, medical records on the blockchain would be within the management of the patient rather than a third party, through the patients’ private and public keys. Patients may then control access to their health records, making transferring information less cumbersome. Because blockchain ledgers are immutable, health information may not be deleted or tampered with. Blockchain transactions would be accompanied by a timestamp, permitting those with access to maintain updated information. The doctor would not be able to access the record without the consent of the patient. A patient would need to sign the transaction in a smart contract in order to transfer patient details to the doctor.
Question 6: So, how are private data protected when the patient is simply notified that unauthorized access just took place on her medical record? and, how are the negative results of this breach rectified towards the patient?
Block.co Team Answer: The patient would be notified to sign a transaction enabling access to the party requesting access to the specific medical record. In other cases, there could be a multi-signature wallet requiring multiple transactions in the cases where the patient may need assistance, for example, when underage or when not in a healthy state of mind, or being non-responsive or in critical condition. The patient needs to be responsible for his own data and be empowered through awareness and know-how of this technology. With great power, comes also great responsibility, although it is yet a challenge to enable computer illiterate people to interact with this technology.
Question 7: Can the same record of a patient still be shared with private hospitals and say another government/private hospital abroad on the same blockchain?
Block.co Team Answer: Depending on whether the information is on a public blockchain or a private blockchain. When on a private blockchain, they will need to be granted permission to access the blockchain accordingly.
Question 8: No one has directly spoken about ownership where a large research institution/ consortium is working with the data – it is not solely the person who has said so…
Block.co Team Answer: Indeed, it is solely not the person who has a say so. Technology may be used in both evil and good ways and it is still the obligation and responsibility of people within governments to ensure human liberties and rights are preserved when utilizing such powerful technologies such as blockchain and sometimes the combination of blockchain with AI, IoT, and biometrics. Blockchain in Healthcare, in the same way, that it can empower individuals and increase their standard of living and prosperity, at the same time, it can also empower corrupt governments with alternative agendas and totalitarian states. Block.co believes it is most important for people to be educated around the matter and be able to form a voice and movement to safeguard their human liberties and rights, hence our continuous effort on discussing these matters with our community and providing education, powered by the pioneers in the space, the University of Nicosia.
We would like to thank everyone for attending our webcast and hoping to interact with you in future webinars. If you would like to watch the webinar again, then click here!
For more info, contact Block.co directly or email at [email protected].
Tel +357 70007828
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I ruin people’s lives for fun, this is my story. [Chapter 3]

Chapter 1
Chapter 2
Good morning. It is currently 9 in the morning, and I am just finishing up my coffee at a local shop. I always get the same thing: A large iced coffee with 4 ice cubes and 2 packets of sugar. That concoction makes it the perfect temperature to enjoy.
I tend to do everything by routine, because I like to think it makes me more organized if I do it that way. Life is just a whole bunch of patterns someone has yet to figure out.
I was looking more into Jason’s assets and accounts. I came across something that made me laugh. He has been paying Kiley $1,000 every week. So from my observations, Kiley looks like an escort.
I think that this is helpful, because now I know that she doesn’t have a trustful relationship with him. I mean the money was being paid to the website to hire escorts. I really don’t care about Kiley though. She isn’t important to the game anymore.
I have to go to work in about an hour so I need to finish this up pretty quickly. I wanted to make the process of fucking with Jason long. I went on the dark web for a minute to see if I could come across a device that could withdraw money via ATM from previous accounts that had been connected to said ATM.
If that made any sense, my plan would be to buy this tool, and steal money from Jason’s account. I know I used bitcoin for the last one, but I thought this would be more eventful. I wanted more hands-on experience if you know what I mean.
I forgot to mention that I saw that Jason had a permit for concealed carry, so I need to keep this in mind.
After searching on a couple of the markets that I have accounts with, I finally came across it. It was around $200. I just went ahead, and used the funds that were already on my account to purchase it. It says that it ships domestically, so it should be here in the next few days. I will continue with this update after I get done with my shift.
I have just finished my shift, and I'm exhausted from how pestering my boss is. That prick just loves his sales quotas.
I got a confirmation letter from the vendor to my private email saying:
Your purchase was confirmed and the shipping process will now begin … thanks for doing business.
Fantastic! Now we can get to the fun part. I wanted to look more into his odd transaction with a car wash in Florida. I looked up the car wash, and it was only 2 miles away from Jason’s vacation home. I went ahead and called.
Some women picked up, “JJ’s car wash … how may I help you?"
I replied with, “Good, good. I was just wondering if I could get in contact with the owner? I wanted to come over, and do an evaluation on the value of the land … Is he there right now, or could you possibly give me a phone number to reach him?”
She hesitated, and said, “Uhhh, I'm sorry, sir, I'm not really sure if I can give that info out. Let me ask my manager.”
I interrupted her with, “No, that won’t be necessary. Just give me his email, and I’ll send him the information myself. Thanks.”
She said, “Sure … it's [email protected][redacted].com”
I hung up saying, “Thanks so much for your help. It means a lot. Thanks.”
Some people are just so oblivious to the world that they’ll believe anything they hear. Well, I guess I shouldn’t be complaining because that email is the same as Jason's. He owns some little car wash near his house in Florida. I wanted to look more into this, but thought that for right now it's a waste of time. (Added "that". Apostrophe on "it's", because it's= it is.)
Well, I went ahead and drove over to the nightclub Jason goes to every Wednesday night to see what he was up to there. I disguised myself as much as I could. I mean there were a lot of people here so no one would notice me unless I was face to face with them. I had a hat on and a hoodie. I just looked down at the floor as much as I could. I followed Jason in after he arrived with his driver. He went upstairs where VIPS are only allowed. I kept an eye on him for a while. He then disappeared to a back room which had me curious. I needed to figure a way to get upstairs without anyone questioning my authenticity. I went to the back room where I guess the staff gets ready. I found this work shirt that was black and an extra pair of pants that were a size too big. I had a belt on me so that wasn’t an issue and I put on the clothes and now I looked like a waiter. I went to the bar and said I needed 6 “on the rock” martinis and handed her a tray to put them on. She asked, “You work here?” I said, “Yeah, new … these are going upstairs so make it quick.” She nodded and proceeded to make the drinks. She handed me the tray and I carefully made my way up to one of the security guards at the stairs. I looked at him and said, “These are to go up to Mr. Peterson?. He looked at me up and down and waved his hand towards the stairs allowing me to go. I walked up the stairs with the tray in my hands and walked through the back door that Jason had recently disappeared to. I saw a few ladies that were all intoxicated and a couple of men sitting on the couch. There was a nice electric fireplace next to a computer desk that wrapped around the corner of the room. It was a decently big room with a minibar as well. I walked over towards the men. I said, “Excuse me gentlemen but, I have 6 martinis ready to drink in my hand.” I could tell that they all have been drinking because of the way they were slurring their words. Jason spoke up and said, “Perfect thank you … here’s a tip” handing me a $100 bill I took the money and pocketed it saying, “Thank you .. if you need anything else please call down to the bar.” I walked out. That room was soundproof as well because when I walked out my ears were rushed with loud music from the dance floor. I saw another door to my right and my curiosity peaked and I walked through. It was this long hallway and a little red sign saying “Exit”. Nothing special here so I just walked out back downstairs. I went ahead a walked over to the security guard and asked him something, “Which one of those guys is the owner?” He replied with, “You should know this … Mr. Peterson just took over ownership a few weeks ago.” This caught me off guard and I said, “Oh right … thanks.” I was mind blown because of how many properties this guy owned. Where was he getting all of this money … I mean I know that he owns a security company but, 2 houses, 3 companies that all pay in cash, a personal driver, large bank transactions. All of this wasn’t adding up. I went online and did some research.
I have the suspicion that Jason is laundering money through his businesses. I don’t know who he is cleaning money for but, it’s probably someone who doesn’t want their money fucked with. This could be an issue because if I fuck with Jason’s life and his financial situation that someone else could be looking after him. I don’t fear anyone will find me because I make sure I do everything very securely. I should be getting the atm snipping tool soon and hope to make a move on Jason and uncover his dirt. I’m getting excited just writing this right now knowing that I could possibly ruin not just Jason's life but his whole operation. Before I do begin my adventure I need to make a couple of precautionary steps. I logged onto the dark web and found a trustful hacking service. I would never hire someone to hack unless I didn’t have the skills to do the task. I mean if somehow I turned up dead my plan would still carry out. So I found someone who could “ruin” his life. I’ve been chatting with him now to see what type of services he offers and I found one that fits my purpose. I also told him I wouldn’t buy unless I failed my game, which means death. He understood and told me how it would work. He said I would need to put the money in escrow and I told him if I don’t respond within 2 weeks that the money will be sent automatically. By putting the money in escrow it means I can’t take it out and he can’t accept the payment unless all conditions are met with a third party. I set up a zombie computer to be the third party. Usually the vendor or market your on will have an escrow system but, I wanted to make sure that he would certainly get the money if anything happens to me. So I set the zombie and sent the escrow away. The payment was $600 to do whatever was necessary to either ruin them financially or put them in jail. This hacker could make them be known as a child porn user by encrypting his computer with files that would have him arrested. I was thinking of this option or go to a darker market which would put a price on Jason’s head.
Now that this was all set up I could move on and take Jason’s money. I watched him after work for a few nights to see if he would use an atm. He was at a little food market having lunch and used the atm to withdraw $40. I know this because my little tool tells me. So I watched him from across the street to see when he left. He left after eating and walked back to his car where his driver was waiting. They drove off and I waited about 5 minutes before doing anything. Atm machines have cameras so I needed to cover my face before hacking his account. I checked which account he withdrew from before going inside since I had access to his computer passwords. The account he used had approximately $12,000 in it. I knew going into this that I would only withdraw a couple thousand because I didn’t want the bank instantly freezing his account even though after he noticed, he would call and tell them. So I set up a script that would take $10,000 through tiny transactions with bots and have them located from all over the world so it wouldn’t be able to trace back to me. It would then compile the transactions back to an offshore account that I made. I would set this into action as soon as I withdrew the $2,000 in cash from the atm. This would leave Jason with $0 in his one account. I knew that he had other accounts but, the one that I was targeting had the highest balance.
I put on a bandana and some dark sunglasses with a hoodie on and walked inside. I got myself a little drink and paid in cash making sure to keep my fingers off the handle. I then went over to the atm and placed the tool where you put the card in. It loaded up this menu on the screen and it listed a couple of names from the recent customers that withdrew money. I clicked the arrow down to “Jason Peterson” and typed in the box that said “Custom amount” $2,000. It then went to another screen saying “Please remove your card before money dispenses.” I removed the tool and out came Jasons 2 grand. I put it in my wallet and walked out to my car. I made sure to park in a parking lot that was decently empty with no cameras to catch my plate. I pulled out my phone and went to the Facebook marketplace. I was feeling a new laptop right about now so I started scrolling through. I found one that matched my needs and messaged the seller, “Hey, I am interested in your listing … could we meet today?” He replied back pretty quickly with, “Sure, let’s meet at the [redacted] Starbucks!” The laptop was listed for $250. I told him I would pay in cash and I would be there in 20 minutes. I went to the Starbucks and met with the guy selling it. He was a nice guy who told me he just upgraded so that’s why he was selling it. I asked him to turn it on to make sure it works, which it did. I handed him the cash and wished him well. I walked outside and got into my car. I pulled around to the drive-through and got myself a large coffee with extra cream and sugar. After I got my coffee I went home and got a call from my boss asking where I was today. I told him that I really didn’t feel like working today which he replied telling me to not come back tomorrow and I was finished working there. I had a pretty big smile on my face at this point because now my time would be devoted to ruining Jason’s life.
I poured myself a nice glass of whiskey to end off the night right. I mean this would be the perfect time to celebrate. I just got fired and have over 10 grand in my pocket. I don’t want to get ahead of myself yet. It has been a couple of days since I sent that money in escrow and if I don’t get my job done before the 2 weeks are over then someone else will do it for me. This was like a tiny challenge in the midst of the much bigger challenge. Look at this way. I want to take credit for ruining Jason’s life or all of my work will go to waste. I mean the dark web hacker isn’t watching Jason’s every move and reading him like I was. All he had to do was sit on his ass and type on a computer. In this day and age that’s all you need. Hell, that’s how I ruined Connor’s life. I told you from the beginning that I wanted to up my game. I had the proper funds now to really up my game. In the morning, I went to go to a local Walmart to pick up a few things. I wanted to make a homemade suppressor. I was looking at the prices on the dark web but, if I could save some money doing it, then why not right? So I looked up how to make a homemade suppressor and picked up the right supplies to make it. You need some PVC pipes, steel wool, a drill, and a few other things and you got yourself a suppressor. It didn’t take to long to make and it fits real snug on my .50 caliber sniper rifle. No, I wasn’t going to kill Jason because that would be too easy. I wanted to fuck with him a little longer before really getting down and dirty. Pull his strings like a puppet if you will. My plan was this. I would find a time where Jason was alone and I would call him. I would tell him if he wanted his money back that we would have to meet. I would specify that he and only him would come and if anyone else was to show that his funds would be long gone before he ever got there. I would then drug him with chloroform and take him to a secluded place where no one would find us. I would then tell him to give up all of the information on the people he works for or he and Kiley dies. I thought to introduce that I know Kiley that it would motivate him a little more. Just the strings in his life. If that didn’t work my plan would be to tell him that the police were raiding his house for child pornography which I downloaded on his computer. I would show him his files from my laptop remotely to prove it and if that didn’t work we would figure something else out.
I wanted to move forward with this as soon as possible. I grabbed my car keys and headed out the door. Today I wasn’t going to do anything with Jason. Today I needed to shop. While I was at Walmart this morning I grabbed some bleach and rubbing alcohol to produce the chemical chloroform which would make Jason unconscious. I also picked up some latex gloves for prints. I bought myself a burner phone at a gas station near my apartment too. Now that I have all of my supplies I headed over to a Starbucks. I ordered my usual large coffee with 4 ice cubes and 2 packets of sugar. I brought my new laptop with me and connected it to the free wifi. This laptop wouldn’t be coming home with me. I was going to use this laptop to connect me to Jason’s stock portfolio. After I hacked into it I would sell all of his stocks that were a part of any company he owned leaving him with nothing in return. Basically sweeping the owner's name tag out from under his feet. I would then corrupt the hard drive and throw the laptop in the dumpster. After this, it was time to burn everything he owned to the ground. I wanted to leave him and the people he worked for with nothing in return … absolutely nothing.
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Spreading Crypto: In Search of the Killer Application

Spreading Crypto: In Search of the Killer Application
This is the second post of our Spreading Crypto series where we take a deep dive into what it’ll take to help this technology reach broader adoption.
Mick exploring the state of apps in crypto
Our previous post explored the history of protocols and how they only become widely adopted when a compelling application makes them more accessible and easier to use.
Crypto will be no different. Blockchain technology today is mostly all low-level protocols. As with the numerous protocols that came before, these new, decentralized protocols need killer applications.
So, how’s that going? Where is crypto’s killer application? What’s the state of application development within our industry? Today we’ll try to answer those questions. We’ll also take a close look at decentralized applications — as that’s where a lot of the developer energy and focus currently is. Let’s dive in.

Popular Crypto Applications

The most popular crypto applications today are exchanges like Coinbase and Binance — each with tens of millions of users. Other popular crypto exchanges include Kraken, Bitstamp, Gemini, and Bitfinex. In recent years, new derivatives platforms have emerged like FTX and Deribit.
The most popular crypto applications today are primarily focused on trading, speculation, and finance. This class of applications dwarfs all other types of applications in terms of users and growth. That’s either a sign of strong product/market fit, or we just haven’t yet discovered other good use-cases. Or a mix of both.
https://preview.redd.it/8rnxghfrdh551.png?width=1600&format=png&auto=webp&s=b3df8c3d87410f6b84432df79528ee4324daf04d
Beyond the fact that the most popular crypto applications are all used for speculation, another common thread is that they are all centralized.
A centralized application means that ultimate power and control rests with a centralized party (the company who built it). For example, if Coinbase or Binance wants to block you from withdrawing your funds for whatever reason (maybe for suspicious activity or fraud), they can do that. They have control of their servers so they have control of your funds.
Most popular applications that we all use daily are centralized (Netflix, Facebook, Youtube, etc). That’s the standard for modern, world-class applications today.

Decentralized Applications

Even though the most popular crypto applications are all centralized, most of the developer energy and focus in our industry is with decentralized applications (dApps) and non-custodial products.
These are products where only the user can touch or move funds. Not even the company or developer who built the application can access or control or stop funds from being moved. Only the user has control.
These applications allow users to truly become their own bank and have absolute control of their money.
They also allow users to perform blockchain transactions and interact directly with decentralized protocols. Some of the most popular non-custodial products include Ledger, MetaMask, and MyCrypto (#ProudInvestor).
While the benefits of this type of application are obvious (user has full control of their funds), it comes with a lot of tradeoffs. We will cover that later in this post.
https://preview.redd.it/rs6tj7vsdh551.png?width=1600&format=png&auto=webp&s=86fe5bca3a9466abab5e78c9873ce3b57609f2d2

Libertarianism + Crypto

If the most popular applications tend to be centralized (inside and out of crypto), why is so much of our community focused on building decentralized applications (dApps)? For the casual observer, that’s a reasonable, valid question.
“Not your keys, not your coins.”
This meme is endlessly repeated among longtime crypto hodlers. If you’re not in complete control of your crypto (i.e. using non-custodial wallets or dApps), then it’s not really your crypto.
Engrained in the early culture of Bitcoin has always been a strong distrust for centralized authority and power — including the too-big-to-fail government-backed financial system. In the midst of the Financial Crisis, Satoshi Nakamoto included this headline in Bitcoin’s genesis block: “Chancellor on brink of second bailout for banks.” There has always been a close connection between libertarianism & cryptocurrency.
So it’s no surprise that much of the crypto developer community is spending their time building applications that are non-custodial or decentralized. It’s part of the DNA, the soul, the essence of our community.
https://preview.redd.it/fy33zhkvdh551.png?width=1600&format=png&auto=webp&s=386c741f13e9119ecfcfffe1c781d09ce58704ed

Personal Experience

When I was at Mainframe, we built Mainframe OS — a platform that developers use to build and launch decentralized applications (dApps). I’m deeply familiar with what’s possible and what’s not in the world of dApps. I have the battle scars and gray hair to prove it. We’ve hosted panels around the various challenges. We’ve even produced videos poking fun at how complicated it is for end-users to interact with.
After having spent three years in the trenches of this non-custodial world, I no longer believe that decentralized applications are capable of bringing crypto to the masses.
While I totally understand and appreciate the ethos of self-sovereignty, independence, and liberty… I think it’s a terrible mistake that as a community we are spending most of our time in this area of application development. Decentralized applications will not take crypto to the masses.
Mainframe OS

Overwhelming Friction

The user friction that comes with decentralized applications is just too overwhelming. Let’s go through a few of the bigger points:
  1. Knowledge & Education: Most non-custodial products do not abstract away any of the blockchain complexity. In fact, they often expose more of it because the most loyal users are crypto nerds. Imagine how a normie n00b feels when she starts seeing words like seed phrases, public & private keys, gas limits, transaction fees, blockchain explorers, hex addresses, and confirmation times. There is a lot for a user to learn and become educated on. That’s friction. The learning curve on this is just too damn high.
  2. User Experience: It is currently impossible to create a smooth and performant user experience in non-custodial wallets or decentralized applications. Any interaction that requires a blockchain transaction will feel sluggish and slow. We built a messaging app on Ethereum and presented it at DevCon3 in Cancun. The technical constraints of blockchain technology were crushing to the user experience. We simply couldn’t create the real-time, modern messaging experience that users have come to expect from similar apps like Slack or WhatsApp. Until blockchains are closer in speed to web servers (which will be difficult given their decentralized nature), dApps will never be able to create the smooth user experience that the masses expect.
  3. Loss of Funds Risk: There is no “Forgot Password” functionality when storing your own crypto in a non-custodial wallet. There is no customer support agent you can ping. There is no company behind it that can make you whole if you make a mistake and lose your money. You are on your own. One wrong move and your money is all gone. If you lose your private key, there is no way to recover your funds. This just isn’t the type of customer support experience people want or are used to.
Onyx Messaging App

What Our Industry Has Wrong

Decentralized applications will always have a place in the market — especially among the most hardcore crypto people and parts of the world where these tools are essential. I’m personally an active user of many non-custodial products. I’m a blockchain early-adopter, I like to hold my own money, and I’m very forgiving of suboptimal UX.
However, I’m not afraid to say the poop stinks. Decentralized applications simply cannot produce the type of product experience that mainstream consumers expect.
If the goal is growth and adoption, as a community I believe we’re barking up the wrong tree. We are trying to make fetch happen. It isn’t gonna happen. Our Netscape Moment is unlikely to arrive as long as we’re focused on decentralized applications.
\"Mean Girls\" movie
There’s a reason why the most popular consumer applications are centralized (Spotify, Amazon, Instagram, etc). There’s a reason why the most popular crypto applications are centralized (Coinbase, Binance, etc).
The frameworks, tooling, infrastructure, and services to support these modern, centralized applications are mature and well-established. It’s easier to build apps that are fast & performant. It’s easier to launch apps that are convenient and on all form-factors (especially mobile). It’s easier to distribute and promote via all the major app store channels (iOS/Android). It’s easier to patch, update, and upgrade. It’s easier to experiment and iterate.
It’s easier to design, build, and launch a world-class application when it is centralized! It is why we’ve chosen this path for Genesis Block.
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We have a lot more content coming. Be sure to follow our channels: https://genesisblock.com/follow/
Have you already downloaded the app? We're Genesis Block, a new digital bank that's powered by crypto & decentralized protocols. The app is live in the App Store (iOS & Android). Get the link to download at https://genesisblock.com/download
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Building Ergo: SPV security

There’s often a tension in the crypto world between security and convenience. That trade-off is unacceptable if we want these technologies to be widely used. Here’s how Ergo addresses one common and very important issue.
We all know that the most secure way to use Bitcoin, or any crypto, is to download a copy of the blockchain and run a full node yourself. That way, every time you or anyone else makes a transaction, your client checks the blockchain to ensure it’s valid. You don’t have to trust anyone else.
A full Bitcoin node checks all the blocks in the blockchain (using headers) and makes sure there are no fraudulent transactions. It’s a very secure way of using crypto – but there’s a problem. It requires significant bandwidth, storage and processing power. That kind of commodity hardware is expensive, and using a full node to validate and make transactions is in any case unsuitable for mobile devices. This is particularly true for Bitcoin, where the blockchain is over 270 GB and counting.
SPV
Simplified Payment Verification (SPV) is designed to address this problem, as described in the Bitcoin white paper:
Satoshi notes that this is not a perfect solution, and is vulnerable to an attacker overpowering the network and fooling SPV users.
Moreover, while SPV mode is intended for resource-limited devices, even this ‘lite’ approach is not always feasible. Ethereum’s headers alone total around 5 GB to download. Thus Ethereum mobile clients do not validate chain validity and so blindly have to trust third parties.
There are proposals to reduce the requirements for SPV mode by checking just a few random headers, instead of all of them. But it’s hard to do that securely.
Efficient SPV
Several years have been spent researching and developing secure protocols that allow for efficient SPV clients. The two best-known and most reliable protocols are NiPoPoWs and FlyClient.
Ergo implements NiPoPoWs, or Non-interactive Proof-of-Proof-of-Work. This technology can be explored in full on this dedicated website: https://nipopows.com:
This enables us to build a mobile SPV client that requires around just 100KB of block headers to be downloaded.
A super-efficient Ergo wallet with SPV security is in development, so stay tuned for more updates!
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Ergoplatform.org
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