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Showing posts with label Satoshi Nakamoto. Show all posts
Showing posts with label Satoshi Nakamoto. Show all posts

Monday, February 5, 2018

What is Blockchain Technology, its uses and applications?

https://youtu.be/E_kCCgsldjU

According to Wikipedia, a blockchain,[1][2][3] originally block chain,[4][5] is a continuously growing list of records, called blocks, which are linked and secured using cryptography.[1][6]

Each block typically contains a cryptographic hash of the previous block,[6] a timestamp and transaction data.[7] By design, a blockchain is inherently resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way".[8]

For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority.


Blockchains are secure by design and are an example of a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been achieved with a blockchain.[9]

This makes blockchains potentially suitable for the recording of events, medical records,[10][11] and other records management activities, such as identity management,[12][13][14] transaction processing, documenting provenance, food traceability[15] or voting.[16]

Blockchain was invented by Satoshi Nakamoto in 2008 for use in the cryptocurrency bitcoin, as its public transaction ledger.[1]


. Blockchain - Wikipedia  https://en.wikipedia.org/wiki/Block

Uses and apllications : 
 

Blockchain technology can be integrated into multiple areas. The primary use of blockchains today is as a distributed ledger for cryptocurrencies, most notably bitcoin.[65] 

While a few central banks, in countries such as China, United States, Sweden, Singapore, South Africa and England are studying issuance of a Central Bank Issued Cryptocurrency (CICC), none have done so thus far.[65]

 

The Big Four

Each of the Big Four accounting firms is testing blockchain technologies in various formats. Ernst & Young has provided cryptocurrency wallets to all (Swiss) employees,[79] has installed a bitcoin ATM in their office in Switzerland, and accepts bitcoin as payment for all its consulting services.[80] Marcel Stalder, CEO of Ernst & Young Switzerland, stated, "We don't only want to talk about digitalization, but also actively drive this process together with our employees and our clients. It is important to us that everybody gets on board and prepares themselves for the revolution set to take place in the business world through blockchains, [to] smart contracts and digital currencies."[80]
  
  PwC, Deloitte, and KPMG have taken a different path from Ernst & Young and are all testing private blockchains.[80]

 

Why enterprises should care about blockchain


If you are in business or government or interact with businesses or government (that should be all of you), blockchain technologies will impact you in a profound way.

People much smarter than me who have studied blockchain deeply say this is like the internet before Marc Andreessen co-invented the browser. Then, we had no idea that the world would change as radically as it has. The world will change radically again, and no one can predict how.

However, let’s take a glimpse into the future at what people are working on now, so you get just an inkling of what’s possible.

IBM is putting a lot of wood behind the blockchain arrow and aggressively going after business. One example is a project with Walmart to track food shipments. Let’s use the example of mangos. Why is this important and how does the blockchain fit in?

This food-tracking application is important because Walmart wants to have all the information it can about the mangos it’s buying. Armed with this information, Walmart can do many valuable things:

  • Verification: Verify that the mangos that claim to be organic are actually organic (ensures quality) Tracking: Track the mangos as they travel from the farm to the store, so they know where they are and when they will arrive (reduces cost)
  • Ensure quality: Ensure that if they need to be refrigerated within 40 and 50 degrees to ensure freshness, that they were refrigerated correctly during shipment (ensures quality
  • Recall management: Know exactly which mangos should be taken off the shelves if there’s a problem with the food (both ensures quality and reduces cost)
  • Automation: Reduce human interaction required between the farmer, distributors, brokers and the buyer (reduce cost)

But where does the blockchain fit in? Here’s how a blockchain-enabled mango-buying transaction works better than a process without the blockchain.

VERIFICATION

It turns out that people eat more food that has been labeled "organic" than is farmed. That's because there is fraud in some claims as to whether or not something is organic and those things can make their way into shipments unbeknownst to the buyer. Now, the mangos get labeled at the source, by a trusted entity that deems them organic. That information is then recorded on the blockchain, and that information cannot be changed. The "proof of organic" is now locked in and Walmart now fully trusts its mangos are organic. That makes it very difficult to fraudulently sell you mangos that are not organic.

TRACKING

Walmart is great at removing costs from their supply chain - maybe the best in the world. Now, they can build in a delivery price guarantee into the system, without human intervention. It works like this. Using a smart contract (code that represents an agreement) Walmart can say they will pay a certain amount for mangos that show up on the shipping dock within a specific shipment window. And, they can do that without having to create paperwork representing a different price for a late shipment. The payment to the late shipper gets changed automatically, based on the code in the smart contract.

ENSURE QUALITY

If the refrigerator truck in which the mangos are being shipped has a malfunction, the mangos could go bad. The shipper might not realize there's a problem, and Walmart might not realize there's a problem, but the consumer will be very unhappy. If the transportation company has thermometers on their truck continually report the temperature of the truck during transport, then Walmart will know that the mangos are fresh when they arrive, ensuring high quality. And, this is done automatically on the blockchain due to a trusted source of information (the thermometers) communicating with the smart contract that has set the temperature parameters.

RECALL MANAGEMENT

Sometimes mangos need to be recalled for one reason or another. Without the blockchain, Walmart might have to remove many thousands of mangos to ensure no customer gets a bad one. With the blockchain, Walmart now knows exactly what mangos need to be taken off the shelf. This ensures the bad mangos are removed. Yes, other technologies exist today that can do something similar as it’s related to tracking mangos. However, what the blockchain does is provide a higher level of confidence that fraud did not occur at some point along the way to protect the entity that enabled bad mangos to happen in the first place.

AUTOMATION

Today, a lot of intermediate transactions can exist in a transportation process. For example, transactions between the farmer and the broker; between the broker and the shipper; between the shipper and Walmart. These transactions usually require people to approve or deny some aspect of the movement of products. Through smart contracts, a lot of these approvals can be automated and sped up by removing people from the equation. This both reduces costs and speeds up the process.

Of course, this is only one example of an application that can transform an industry. Many, many other applications are being built to address very different use cases. I recommend you start to become educated on what is going on so you can get ahead of the curve.

Glenn Gow
By Glenn Gow is the Marketing Partner at Clear Ventures, a CEO Coach, Board Member and Advisor, and a Blockchain Strategist.


Is bitcoin a scam?

Is bitcoin a Ponzi scheme?


Is bitcoin one humongous scam or Ponzi scheme? Before I answer that question, let’s look at the four typical characteristics of a Ponzi scheme.

First of all, there must be a promoter for the scheme. It may be a single individual or a corporation.

The key point here is that there is a single party promoting (and thus benefiting from) the scheme. The second characteristic is the promised return.

To attract gullible investors the scheme will promise unrealistic sky-high returns. The saying “if it is too good to be true, it probably is” always applies in this scenario.

The third characteristic pertains to the investment’s liquidity, which simply means how easy it is to get out once you are in. The promoter will tend to discourage investors from cashing out using and will do so using one or more of these three approaches.

The stick approach is where the investor loses a portion of his investment if he withdraws early.

Conversely the carrot approach entices the investor to stay in by promising even higher returns the longer he keeps the funds invested.

Finally the “too-good-not-to-share” approach requires the investor to find a new investor to take over his investment. In short, he needs to look for new fools to buy him out.

Yes, the Ponzi scheme’s liquidity is at the mercy of the promoter’s whim and fancy.

Thus we come to the fourth characteristic. Ponzi schemes require a constant flow of new investors (read: new money) to fund the payout to early investors.

Before the promoter vanishes into thin air, a small number of EARLY investors DO actually get to cash out and enjoy the ridiculous returns. This is done intentionally by the promoter to “instill” confidence in the scheme as these early investors will help to bring in new investors.

Let’s apply these four characteristics to Bitcoin. The decentralised nature of bitcoin means that there is never a single party promoting bitcoin.

One may argue that there are plenty of people promoting the virtues of bitcoin.

However these are all unrelated parties, akin to different investment advisers promoting the virtues of gold as an investment.

What about returns?

Yes, bitcoin has provided spectacular profits to some investors in the past year.

However these profits were never promised in the first place. In fact people have lost money trading bitcoins, in spite its meteoric rise. This is due to the extreme volatility of the price.

Does bitcoin have sufficient liquidity that is, can you get out? All the recent headlines about regulators and banks freezing the accounts of crypto-related transactions have given the impression that it is hard-to-get-out once you are in.

However, nothing could be further from the truth. The decentralised nature means that there are so many alternatives for selling bitcoins, although not all are convenient.

Finally, are bitcoin investors who are late to the party effectively funding the early investors’ profits?

On that note, bitcoin may sound similar to a Ponzi scheme.

Then again the same can be said of investors who entered the markets at the peak of the dotCom bubble or the housing bubble.

This is a zero-sum game.

I would be remiss if I did not acknowledge the existence of numerous proven scams out there that uses or references Bitcoin.

To counter that point, note that these scams never actually put money into bitcoin, merely hitching a ride on the bitcoin bandwagon and hype.

Prior to the emergence of cryptocurrencies, Ponzi schemes already existed. These schemes claim to use special techniques to generate spectacular profits from various asset classes such as commodities or real estate. Do you hear anyone labelling real estate as a Ponzi?

That said, I must make the point clear that one can easily lose a fortune putting hard earned money into either bitcoins or a Ponzi scheme. Nevertheless, bitcoin is not a scam or Ponzi scheme, as outlined by the points above.

Source: The Star, by Chong Jin Yoong, CFA, is a financial markets trainer and consultant.

Readers can learn more about whole bitcoin and cryptocurrency saga at a talk organised by The Star on Feb 10 entitled “Bitcoin: Dive in or stay away?”

Related Links:

Bitcoin's Big Wipeout Erased $46 Billion of Value Last ... - Bloomberg




Bitcoin: Dive In or Stay Away - Events by Star Media Group


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Tuesday, September 19, 2017

JPMorgan CEO warns he will fire any employee trading Bitcoin for being “stupid.”

 

 
Tough stand: Dimon has warned that he will fire JPMorgan traders who traded in bitcoin ‘in a second. For two reasons: It’s against our rules, and they’re stupid. And both are dangerous.’ — AFP

NEW YORK: JPMorgan Chase & Co chief executive officer Jamie Dimon said he will fire any employee trading bitcoin for being “stupid.”

The cryptocurrency “won’t end well,” he told an investor conference in New York on Tuesday, predicting it will eventually blow up. “It’s a fraud” and “worse than tulip bulbs.”

If a JPMorgan trader began trading in bitcoin, he said: “I’d fire them in a second. For two reasons: It’s against our rules, and they’re stupid. And both are dangerous.”

Bitcoin has soared in recent months, spurred by greater acceptance of the blockchain technology that underpins the exchange method and optimism that faster transaction times will encourage broader use of the cryptocurrency.

Prices have climbed more than four-fold this year – a run that has drawn debate over whether that’s a bubble.

Bitcoin initially slipped after Dimon’s remarks. It was down as much as 2.7% before recovering.

Last week, it slumped after reports that China plans to ban trading of virtual currencies on domestic exchanges, dealing another blow to the US$150bil cryptocurrency market.

Tulips are a reference to the mania that swept Holland in the 17th century, with speculators driving up prices of virtually worthless tulip bulbs to exorbitant levels.

That didn’t end well.

In bitcoin’s case, Dimon said he’s sceptical authorities will allow a currency to exist without state oversight, especially if something goes wrong.

“Someone’s going to get killed and then the government’s going to come down,” he said.

“You just saw in China, governments like to control their money supply.”

Dimon differentiated between the bitcoin currency and the underlying blockchain technology, which he said can be useful.

Still, he said banks’ application of blockchain “won’t be overnight.”

The bank chief said he wouldn’t short bitcoin because there’s no telling how high it will go before it collapses.

The best argument he’s heard, he said, is that it can be useful to people in places with no other options – so long as the supply of coins doesn’t surge.

“If you were in Venezuela or Ecuador or North Korea or a bunch of parts like that, or if you were a drug dealer, a murderer, stuff like that, you are better off doing it in bitcoin than US dollars,” he said.

“So there may be a market for that, but it’d be a limited market.”— Bloomberg


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Wednesday, May 4, 2016

Who created Bitcoin? How? Why? The long search may not be over


SAN FRANCISCO  — Who is Satoshi Nakamoto? For many in the tech world, the identity of bitcoin's elusive creator has been a long-running parlor game. And the speculation might not be over.

Australian entrepreneur Craig Steven Wright, who announced Monday that he founded the digital currency , convinced at least one longtime bitcoin contributor that he's the real deal. He managed that feat via a technical demonstration involving Nakamoto's secret bitcoin keys. But Wright's public documentation, which he posted online Monday , underwhelmed others and left the question of Nakamoto's true identity far from settled.

"There's no way you can conclusively prove that you are the creator of bitcoin," said Jerry Brito, executive director of Coin Center, a Washington, D.C.-based crypto-currency think tank, who is skeptical of Wright's claims.

Tracking a pseudonymous cryptographic genius would be challenging under the best circumstances. And here we're talking someone who invented a way for people to send money around the world anonymously, without banks or national currencies. Someone who apparently disappeared five years ago for unknown reasons.

None of that has stopped people from trying. Journalists, researchers and amateur detectives have scoured Nakamoto's emails and online posts, plus the original bitcoin code, for unusual phrases, cultural references and other potential clues to their author.

One of the most celebrated candidates — to his own dismay — was an unassuming Japanese-American engineer who found himself in the cross-hairs of Newsweek magazine in 2014.


A Newsweek cover story fingered Dorian Satoshi Nakamoto, a retired resident of suburban Los Angeles County, after citing circumstantial clues and a vague comment that Nakamoto made when confronted briefly on his front doorstep. The article sparked a media frenzy and a car chase with reporters that ended at the Los Angeles offices of The Associated Press — where Dorian Nakamoto emphatically denied any involvement with bitcoin.

An earlier contender named in a 2011 New Yorker magazine piece was Michael Clear, then a graduate student in cryptography at Trinity College in Dublin. The New Yorker cited some of Nakamoto's writings, which used British slang such as "maths" for mathematics and "flat" for an apartment. It also noted that Clear had worked on currency-trading software for an Irish bank and co-authored a paper on "peer-to-peer" technology similar to that used in bitcoin.

At first, according to the New Yorker, Clear was evasive when asked at a cryptography conference if he had created bitcoin. But he later denied it repeatedly. He also suggested another candidate to the New Yorker reporter, naming Finnish researcher Vili Lehdonvirta, who studied virtual currencies and created video games.

"I would love to say that I'm Satoshi, because bitcoin is very clever," Lehdonvirta told the New Yorker, after laughing for several seconds. "But it's not me."

Speculation has also focused on a Hungarian-American computer scientist named Nick Szabo, who was called a likely candidate by linguistic experts who conducted their own "reverse textual analysis" — essentially, looking for distinctive phrases or word patterns — on an early white paper by the bitcoin creator.

The only problem? Szabo, who has worked on other digital currencies, has repeatedly denied creating bitcoin.

Other scientists' names have surfaced over the years; some theories pose the notion of two or three working together. But denials have usually followed each new mention.

At one point, two Israeli mathematicians floated, and later retracted, the notion that bitcoin was created by the founder of Silk Road, an online bazaar known for trade in various illicit goods.

Conspiracy theorists have even speculated it could have been the work of some shadowy government agency — no one's saying which government — to undermine established currencies or somehow monitor online transactions. (That theory depends on the unproved notion that the creator retained the ability to decode bitcoin's encryption.)

Vice magazine once suggested Nakamoto might be Gavin Andresen, an American software expert and early bitcoin enthusiast who has helped push bitcoin forward in Nakamoto's absence. Andresen has denied it — and on Monday declared that he believes Wright is Nakamoto.

But other cryptocurrency enthusiasts aren't convinced it's Wright. The truth, they say, is still out there. - AP



Image for the news result
AP EXPLAINS: What Is Bitcoin? A Look at the Digital Currency How it work, security, vulnerability and why? 

Comments:

Indeed, the way Wright has stage-managed the latest revelations about himself seem inconsistent with what we know about Nakamoto. Wright chose to give his scoop to the BBC, the Economist, and GQ. These are all excellent publications, but none of them are known for their in-depth coverage of computer security. The real Satoshi Nakamoto should have anticipated that no one would give much weight to a GQ scoop about his identity.

Bitcoin was Nakamoto's attempt to create a financial system that didn't require trusting the fallible human beings that run the banking system. Yet when Wright decided to reveal his identity as Nakamoto, he chose to do it via face-to-face meetings with a handful of journalists and Bitcoin insiders instead of providing mathematically rigorous proof that anyone could verify. It's hard to believe that's what Nakamoto would have done.


http://www.vox.com/cards/bitcoin

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Tuesday, August 25, 2015

Bitcoin CEO arrest leaves long trail of unanswered questions

Bitcoin trader Kolin Burges from London protests against Tokyo-based bitcoin changer MtGox in front of the company's office in Tokyo on February 26, 2014.



Tokyo (AFP) - The arrest of MtGox boss Mark Karpeles has begun to shed light on the defunct Bitcoin exchange after hundreds of millions of dollars in virtual currency vanished from its digital vaults last year.

But as details of a lengthy investigation by Japanese police trickle out, at least one crucial question remains unanswered: where is the money?



On Friday authorities issued a fresh arrest warrant for Frenchman Karpeles over claims he stole several million dollars from clients, including about $48,000 allegedly spent on a luxury canopy bed.

Karpeles, 30, who has reportedly denied the allegations, was initially taken into custody earlier this month and has been held without formal charges for three weeks, as allowed under Japanese law.

A fresh warrant resets the clock on how long police can hold him and grill the self-described computer geek over Tokyo-based MtGox's missing Bitcoins.





Bitcoin trader Kolin Burges from London protests against Tokyo-based bitcoin changer MtGox in front of the company's office in Tokyo on February 26, 2014.



So far, police have accused Karpeles of manipulating data and stealing sums that amount to just a fraction of the 850,000 coins -- worth around $480 million at the time, or $387 million at current exchange rates -- that disappeared last year. 
ms im bitcoin ron1_00001714.jpg

MtGox, which once said it handled around 80 percent of global Bitcoin transactions, filed for bankruptcy protection soon after the cyber-money went missing, leaving a trail of angry investors calling for answers.

The company initially said there was a bug in the software underpinning Bitcoins that allowed hackers to pilfer them.

Karpeles later claimed he had found some 200,000 of the lost coins in a "cold wallet" -- a storage device, such as a memory stick, that is not connected to other computers.

But the whereabouts of the money and Karpeles' involvement appear far from solved. "If there were instances of mismanagement or fraud like this carried out by Mark Karpeles, then he should be held accountable," Bitcoin investor Kim Nilsson told AFP.
Mark Karpeles, head of the MtGox Bitcoin exchange, …

(But) if these charges against (him) don't adequately explain where all the Bitcoin ... money went, then there are still unresolved questions, quite possibly additional crimes and criminals, that must be investigated further."

 - Real or fake? -

Nilsson also questioned whether MtGox's Bitcoin deposits were even real in the first place.

"Did MtGox at any point actually hold the coins in question, or have there been faked deposit entries merely making it look that way?" he asked MtGox reportedly kept its own funds and clients' money in the same bank account.

In an interview with Japan's top-selling Yomiuri newspaper, Karpeles' mother said her "genius" son learned computer languages at age three and started making simple programmes of his own two years later.

Back in 2006, Karpeles -- who reportedly lived in an $11,000-a-month penthouse Tokyo apartment -- wrote on his blog that computer crime was "totally contrary to my ethical principles".

But four years later, a Paris court sentenced him in absentia to a year in prison for hacking. He had come to Japan to work for a web development company in 2009 and later got involved with the Bitcoin exchange. - Tangible object -

Investors have called on the firm's court-appointed administrators to publicise its data so that experts around the world can help analyse what happened at MtGox.

But the case presented a complex challenge to Japanese police, as financial watchdogs around the world struggle to work out how to regulate digital money.

Unlike traditional currencies backed by a government or central bank, Bitcoins are generated by complex chains of interactions among a huge network of computers around the planet.

"The Bitcoin case is really an embezzlement case, but embezzlement has to involve a 'tangible object,'" said Hisashi Sonoda, a criminal law professor at Japan's Konan University.

"Japanese criminal law treats digital currency as 'data,' not what we call 'tangible object' in a legal sense."

Backers say virtual currencies, which started to appear around 2009, allow for an efficient and anonymous way to store and transfer funds online.

But critics argue the lack of legal framework governing the currency, the opaque way it is traded and its volatility make it dangerous.

Following Karpeles' arrest, Tokyo vowed to boost digital-currency regulations.

Japan's penal code "is not really catching up with quickly changing business models", hampering authorities' investigation, Sonoda said.

"If there was a clause or a fresh law targeting digital currency, that would have been helpful for investigators."

AFP By Hiroshi Hiyama

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