BITCOIN

BITCOIN

Sunday, February 9, 2014

Why Mt. Gox, the World’s First Bitcoin Exchange, is Dying

“I think I just witnessed Mt. Gox die today. I didn’t get my bitcoin, but glad I came and tried.” - Reddit user ‘CoinSearcher’, after conducting a three-day protest at Mt. Gox’s headquarters in Tokyo.
Mt. Gox, the world’s original and once-largest bitcoin exchange, appears to be in a state of disarray after it suspended bitcoin withdrawals to work on what it said were technical issues. Meanwhile, the clamour of angry customer voices is growing.
The exchange’s moves have had a negative impact on the bitcoin markets. The price of 1 BTC plunged from $850 at the start of the week to $681, according to the CoinDesk Bitcoin Price Index, in the wake of the Gox announcement. It has promised an update on Monday 10th February (Japan time).
The internal workings of Mt. Gox have long been the focus of discussion in the bitcoin community. Users have reported delays in obtaining a ‘verified’ account there after submitting the required identification documents.












The internal workings of Mt. Gox have long been the focus of discussion in the bitcoin community. Users have reported delays in obtaining a ‘verified’ account there after submitting the required identification documents.









Frustrated bitcoin owners have also written about unresolved customer service requests after suffering delays in withdrawing funds from the exchange, with some taking to Twitter to express their opinion on it.

70% polled cannot withdraw their money

A CoinDesk survey of readers who use Mt. Gox has found that nearly 70% of respondents have not received their funds after making withdrawal requests from the exchange. Some 914 respondents said they were still waiting to receive their funds. The median waiting time was between one and three months, with 22% reporting wait times of between one week and a month.
About a third of respondents said they did successfully withdraw funds from Mt. Gox – many of whom had short waiting times. About half reported receiving their funds within a week.
But for everyone else, the waiting game continued. The CoinDesk survey revealed that having a ‘verified’ or ‘trusted’ account at Mt. Gox did little to reduce withdrawal delays.
The majority of CoinDesk readers polled, or more than 85%, said they had ‘verified’ or ‘trusted’ accounts at Mt. Gox. Some 68% of verified account holders, or 822 respondents, said they were still waiting for their withdrawal from the exchange. The median waiting time was between one and three months, and 78% of verified account holders polled said they had been waiting for up to three months.
The CoinDesk survey has attracted more than 2,800 responses since it went live on 4th February.

Reddit user flys from Australia to Gox for sit-in protest

It took a lone protestor to bring the simmering dissatisfaction with Mt. Gox to a boil. Flying for 16 hours from Australia to Japan for a three-day sit-in on a quest for answers as to the fate of his large bitcoin balance, the protestor, known on Reddit as ‘CoinSearcher’, eventually confronted CEO Mark Karpeles and business development manager Gonzague Gay-Bouchery.
The protestor later posted a summary of his experiences on Reddit.
CoinSearcher appeared to alleviate some users’ fears that the top Mt. Gox executives had vanished. Gay-Bouchery’s explanation that most of Mt. Gox’s bitcoins were kept in secure, and not quickly accessible, physical cold-storage in multiple locations made sense to many.
“Because Gox is the best known of all the exchanges, we have been under the regulatory spotlight,” Gay-Bouchery told the protestor, adding:






A spread that was too good to be true

One of the clearest signs that all was not well on Mt. Gox was the exchange’s quoted US dollar price for bitcoin. Quoted prices on Mt. Gox began to diverge sharply from two other major exchanges, Bitstamp and BTC-e, last July. The initial spread shows Gox prices trading at several percentage points above the other exchanges throughout that month.
By the end of August, however, the divergence hit double-digits. Gox prices were more than 19% above BTC-e’s prices on 22nd August, for example. Although the spread oscillated in the following months, it consistently exceeded the 10% mark.
In the run-up to the freeze on Gox, on 28th January, the gap between Gox and Bitstamp’s rates stood at 20%, while the same measure between Gox and BTC-e stood at 26%.


The persistent price differences seemed to be a flagrant violation of the ‘law of one price’ – the economics concept that posits that the price of a freely traded good should be equal across all open markets.
In theory, the massive price differences between the exchanges suggested that there was a persistent arbitrage opportunity to buy bitcoin cheaply on Bitstamp or BTC-e and sell them at a double-digit premium on Mt. Gox.
But as the CoinDesk survey shows, Mt. Gox customers have consistently failed to withdraw their funds from Gox over at least the last three months, when the spread was widest. This suggests that in practice, most opportunists transferring currencies to Gox to take advantage of a higher sale price would have failed to get their funds out of the exchange.

A measure of desperation


The seemingly incredible arbitrage opportunity and Gox’s withdrawal freeze are linked. The roots of the Gox premium can be traced back to June, when the exchange announced it was putting US dollar withdrawals on a “temporary hiatus”.
It later transpired that Gox and its founder, Mark Karpeles, had been ensnared in an operation by US federal agents as they moved against the exchange for failing to register as a ‘money service business’.
The US Department of Homeland Security and the Secret Service seized three accounts linked to Gox containing more than $5m. As research from The Genesis Block shows, the executed seizure warrant was dated 19th June, the day before Gox announced it would halt dollar withdrawals.

All the market observers CoinDesk spoke to agreed that the cause of the Gox premium was the exchange’s persistent withdrawal failures, dating back to June, when US dollar withdrawals were stopped.
As the freeze took effect, Gox customers turned to bitcoin withdrawals as they attempted to get funds out. This worked for a time, but it also increased the volume of bids for bitcoin on the exchange.
“Effectively, the Mt. Gox price reflected the inability to withdraw funds in fiat. This creates only a bid for bitcoin,” said Greg Schvey, co-founder of The Genesis Block.
As a result of the increased volume of bids for bitcoin on Mt. Gox, the bitcoin price began to rise steadily, adding to a widening divergence from prices quoted on other major exchanges.
“We can interpret [the Gox premium] as a measure of fear on the part of customers that they’re not going to get their money back. Their desperation is measured by how much they’re willing to pay for bitcoin [on Gox],” said Garrick Hileman, an economic historian at the London School of Economics.

‘Coding himself out of a mess’

While the exchange has posted a number of notices on its website announcing withdrawal delays, its top executives have remained silent on the matter. The company has posted a notice of delays on its main trading page since the beginning of 2014, originally citing a backlog caused by Japanese New Year business holidays as the cause.
One prominent technical member of the bitcoin community thinks he knows what’s behind the current withdrawal freeze. Andreas Antonopoulos, who recently joined Blockchain.info as chief security officer, says he has studied exchange technologies over the past 15 years. His verdict on Gox’s withdrawal freeze, as an outsider, is scathing:





Antonopoulos outlined what he believes to be the technical reasons behind the Gox freeze. The root of the problem lies in its decision to use a version of the bitcoin client it customised itself, rather than the standard client. As a result, Gox handles the protocol with some discrepancies.
One of those discrepancies, as Antonopoulos understands it, is the way transactions are propagated through the network. A miner on Gox, for example, will prematurely be credited for a new block before the network has a chance to confirm the transaction. As a result, when the transaction hits the bitcoin network to be corroborated, it is rejected. Gox’s solution is to cancel the initial transaction and resubmit it until it is approved.
“This is like putting a Band-Aid on the problem. Gox should not be generating non-standard transactions in the first place. Band-Aids like this will further exacerbate scalability problems,” Antonopoulos said.
In the case of the mining example, the cancelled and resubmitted transactions cause delays in fulfilling withdrawal requests within Gox. This doesn’t necessarily cause huge problems unless the system is under pressure from an external factor, like a spike in withdrawal requests, for example.
“When transactions increase, then there are more delayed transactions, which can cause a panic. It just snowballs,” Antonopoulos said.
A lack of detailed comment or response from Mt. Gox to users or the media has only increased customer concerns about the fate of their money. The company’s location in Japan – where outsiders’ access to information is often limited by a language barrier – has shielded the company from the kind of scrutiny a US-based operation would receive. Furthermore, Gox’s chief executive has made little attempt to address the issues publicly.
“I’ve heard that Mark [Karpeles] has rolled up his sleeves and is trying to code himself out of this mess,” Antonopoulos said. “It’s clear that he lacks the expertise to fix this other than applying another Band-Aid. The things they’ve done in the past won’t get them out of this.”

Looming insolvency?

Roger Ver declared last July he had looked at Mt. Gox’s books and determined it had plenty of fiat currency in the bank, and that withdrawal delays were not being caused by a lack of fiat. He was still optimistic the exchange would fulfill its obligations.
“I don’t have any special insight into Mt. Gox at the moment, but if I had to guess, I think they have the bitcoins and the fiat,” he told CoinDesk.
“I actually think, in the long run, this will be good for bitcoin because it will be clear to the world that there is an open invitation for true professionals to quickly dominate the bitcoin exchange industry.”
Bobby Lee, CEO of exchange BTC China, which actually eclipsed Mt. Gox’s trading volumes at times in 2013, said he also accepted its official explanations. While he didn’t see its immediate problems reaching China, he said negative stories about a company the size of Mt. Gox “could put a damper on the whole bitcoin ecosystem”.
“I was actually quite surprised to hear about the suspension of bitcoin withdrawals at Mt. Gox,” he said.
 
 He went on to say: “Regarding the BTC withdrawal limitations, since they promised to give everyone an update on Monday, I would give them the benefit of doubt at this point. It would also help customers understand better, if Mt. Gox can make a clear statement about their overall solvency status.”

Innocent beginnings

Mt. Gox, owned by a company called Tibanne Ltd, was the largest bitcoin-fiat currency exchange from 2010 until last year. It started life in 2009 as a place for players of Magic: The Gathering to trade cards. Tibanne is run by Mark Karpeles, who acquired the exchange from founder Jed McCaleb in 2011.
In its four-year history, the pioneering exchange has suffered hacking attempts, DDOS attacks, and the same regulatory issues that have plagued other bitcoin businesses.
Along with technical issues, the glare of law enforcement’s spotlight since April 2013 has seen Mt. Gox’s US dollar market-share plunge from over 70% in April to about 19% now, significantly behind Europe’s Bitstamp and BTC-e with 30% and 24% respectively.
Mt. Gox is also the subject of a current $75m lawsuit from former partner CoinLab, which it has also countersued for $5.5m.

SOURCE : COINDESK

CEX.io

Saturday, February 8, 2014

LocalBitcoins.com Users Face Criminal Charges in Florida

At least two men in Florida have been charged for moving large volumes of bitcoins via the popular person-to-person exchange LocalBitcoins.com. They were charged under state anti-money-laundering laws following an investigation by the US Secret Service, said reports.
Security blogger Brian Krebs reported that Michell Abner Espinoza of Miami Beach was arrested after a sting in which an undercover agent engaged him in a fake transaction to convert $30,000 worth of cash into bitcoins.
In addition, 29-year-old Pascal Reid was also arrested after meeting with an undercover agent to exchange $30,000 for bitcoins.

Both of the men are being charged under two laws. The first is Florida’s anti-money laundering law, which targets money exchanges above $10,000.
The second is running an unlicensed money transmission business. Statute 560.125forbids people from exgaging in frequent unlicensed money transmission-type transactions of more than $300 but less than $20,000 in any 12-month period in the state.
Depending on the amount involved, it is considered a felony of the third, second, or first-degree. Exchanging more than $100,000 in funds during any 12-month period is considered a first-degree felony. Fines of twice the currency value, up to a value of $250,000, are possible.
Espinoza, said to go under the name MichaelHack on LocalBitcoins.com, had trades involving more than 150 bitcoins in the last six months, say reports.
Headquartered in Finland, LocalBitcoins.com is a person-to-person trading website, which facilitates trades both online and in person. Unlike exchanges that automatically reconcile trades using an online order book, exchanges like LocalBitcoins.com let users find each other, and handle the trades themselves. The site has been gaining popularity rapidly in recent months, adding roughly 1,000 users each day.

LocalBitcoins reacts

Jeremias Kangas, the owner of LocalBitcoins.com, wasn’t aware of the charges when contacted by CoinDesk. He explained that the site relied on users to follow the laws in their own countries when conducting trades. “That’s our guideline. But it’s quite difficult for us to look after everyone,” he said.
Currently, users are expected to verify each other themselves when handling in-person trades, Kangas noted. The company has been working on a central verification system, although that has not yet been implemented.

Localbitcoins.com does not limit the size of trades, admitted Kangas. “That might be possible, actually. We haven’t thought about that,” he said.

Next steps

Espinoza had his bond hearing today, and faces three charges; two related to money laundering amounts under $20,000 and between $20,000 and $100,000. The third charge relates to money transmission services for amounts between $20,000 and $100,000.
Reid’s case details were not yet on file at the time of writing, but he is being tried for unlicensed money transmission services on a third degree felony.
Image credit: Florida police car conner395
 Source : www.coindesk.com

Friday, February 7, 2014

Leading UK Computer Retailer ‘Scan’ Accepts Bitcoin

Source : www.coindesk.com

Scan Computers has started accepting bitcoin payments, making it the first major PC retailer to accept the cryptocurrency in the UK.
Scan is a bit more than your average PC retailer. It is a big player in the channel, it is one of the biggest sellers of high-end computers in the UK and it builds a range of pre-overlocked rigs for enthusiasts.

A crypto love affair

Since it caters to a geeky user base, Scan quickly recognized that digital currency was an interesting trend to cash in on.
As a result, the retailer decided to start selling mining rigs under its own 3XS brand. So far, the effort has been limited to litecoin miners (the rigs are essentially PCs configured to mine litecoins).
Scan’s James Gorbold told PCR Online that the company is also evaluating other digital currencies like litecoin, but for the time being it is only accepting bitcoins. 
He added:

Plenty of potential

Gorbold said Scan likes to think of itself as an innovator, and that he believes it is the first company in the sector to embrace bitcoin. He added that Scan is excited about the potential of bitcoin and doesn’t want to follow the crowd – it wants to try out new ideas.
Like many other retailers, Scan uses BitPay to handle payments.
Users simply need to choose bitcoin as their payment method, complete the order with bitcoin and BitPay will take care of the rest. It will convert the value of the order and the buyer can then either scan the QR code or manually transfer the amount to the displayed wallet address.
The transaction requires six confirmations, it is also possible to cancel orders and receive refunds using the exchange rate at the time of refund.
British merchants are doing quite well in cross-border sales. Britain is not in the Eurozone and since 2008 the GBP/EUR exchange rate has worked in the nation’s favour.
In many cases it is cheaper to buy and ship a computer or high-end graphics card from Britain than it is to buy one in many Eurozone members. Digital currencies have the potential to make British e-tailers even more competitive.
Disclaimer: CoinDesk founder Shakil Khan is an investor in BitPay.


Thursday, February 6, 2014

How Bitcoin Works

Let’s say you want to test the Bitcoin waters. The first thing you need to do as a new user is install a digital wallet on your computer or mobile device. This wallet is simply a free, open-source software program that will generate your first and subsequent Bitcoin addresses. There are three types of wallets – a software wallet (installed on your computer), a mobile wallet (which resides on your mobile device) or a Web wallet (located on the website of a service provider that hosts bitcoins).
Bitcoin uses public key encryption4 techniques for security. This means that when a new Bitcoin address is created, a cryptographic key pair consisting of a public key and private key – which are essentially unique, long strings of letters and numbers – is generated.
Each address has its own Bitcoins balance, so all you need to do is acquire a number of Bitcoins that will be held at one of the addresses in your wallet. You can acquire Bitcoins through a number of ways – by buying them from a Bitcoin currency exchange such as Mt. Gox or Bitstamp, or through a service like BitInstant that enables fund transfers between Bitcoin exchanges and supports various payment mechanisms.
Note that all Bitcoin transactions are stored publicly and permanently on the Bitcoin network, which means that the balance and transactions of any Bitcoin address are visible to anyone. Experts therefore recommend that Bitcoin owners create a new address for each transaction as a means of ensuring privacy and enhancing security.
Once you have created a Bitcoin address and have acquired Bitcoins, you can use them for an online transaction with a company that accepts Bitcoins as a payment mode. The company will send you the Bitcoin address to which you can send your Bitcoin payment. You direct the payment to that address; while the transaction takes place within seconds, verification can take 10 minutes or longer.
All Bitcoin transactions, without exception, are included in a shared public transaction log known as a “block chain”. This is to confirm that the party spending the Bitcoins really owns them, and also to prevent fraud and double-spending.
Why does transaction verification or confirmation take so long? Because the complex algorithms involved in Bitcoin mining (see description below) take time to solve, even with immense computing power at one’s disposal.
An Example of a Bitcoin Transaction
Let’s assume you want to make an online payment to a company – call it BitChamp – using 5 Bitcoins that you have in an address in your digital wallet. Here are the steps in the transaction:
  1. BitChamp creates a new Bitcoin address and directs you to send your payment to it. This creates a private key (known only to BitChamp) and a public key (available to you and anyone else). Note that just as a seller does not need to know your physical identity if you pay cash, you do not need to disclose your real identity to BitChamp and can remain anonymous.
  2. You instruct your Bitcoin client (the free Bitcoin software you first installed on your computer) to transfer 5 Bitcoins from your wallet to the BitChamp address. This is the transaction message.
  3. Your Bitcoin client will electronically “sign” the transaction request with the private key of the address from where you are transferring the Bitcoins. Recall that your public key is available to anyone for signature verification.
  4. Your transaction is broadcast to the Bitcoin network and will be verified in a few minutes. The 5 Bitcoins have been successfully transferred from your address to the BitChamp address.
Note that only the first two steps involve action by the seller and you respectively. The latter two steps are automatically executed by the Bitcoin client software and Bitcoin network. As well, storing the private key attached to an address safely and securely is of the utmost importance; otherwise, anyone who obtains the private key can control the Bitcoins at that address and use them fraudulently.
Bitcoin Pros and Cons
Bitcoin has a number of advantages:
  • As the first cryptocurrency to capture the public imagination, Bitcoin has “first mover” advantage and a head start over the competition.
  • Total issuance is limited to 21 million, so it is unlikely to be devalued because of the prospect of a massive influx of new bitcoins.
  • As a decentralized currency, Bitcoin is free from government interference and manipulation.
  • Transaction costs are much lower than with conventional currencies.
On the flip side, Bitcoin’s disadvantages include:
  • The price of a Bitcoin has been increasingly volatile, making it difficult to assess its real value and increasing the risk of losses for investors in the cryptocurrency.
  • The relative anonymity of Bitcoin may encourage its use for illegal and illicit activities such as tax evasion, weapons procurement, gambling and circumvention of currency controls.
  • The fact that bitcoins exist primarily in digital form renders them vulnerable to loss.
Conclusion
Bitcoin has made significant progress in its adoption and usage since it was unveiled in 2009. Its evolution over the next few years will determine whether this leading cryptocurrency will become an integral part of the global financial system, or whether it is destined to remain a niche player.
Definitions and Key Concepts
1 Cryptography refers to the practice and technique of using encryption for secure communication and transmission of data and information.
2 In a P2P network, a group of computers is connected to enable the sharing of resources and information by users, and there is no central location for the network. This is diametrically opposed to a typical client-server network, where the central server controls the level of access by users to shared network resources. Popular applications of the P2P concept are Skype and file-sharing services such as BitTorrent.
3 Bitcoin mining refers to the computationally-intensive task of generating Bitcoins. While any computer can be put to the task of Bitcoin mining by using a free mining application, in reality a great deal of computing power is required to solve the extremely complex algorithms involved and to share those solutions with the entire Bitcoin network. The mining process is quite complicated and involves advanced concepts such as cryptographic hashes and nonces.
In simple terms, Bitcoin miners use powerful computers to track and compile pending Bitcoin transactions every 10 minutes into a new block. These miners then set to work doing the intensive number-crunching required to verify all the transactions in the block. This is a competitive process, and the first miner to solve the algorithms and verify the transactions transmits the results to the entire Bitcoin network. Upon confirmation by the rest of the network, the block is then added to the block chain. Each block includes a certain number of Bitcoins in a “coinbase” transaction that is paid out to the successful miner. This reward was set at 50 Bitcoins when the system first commenced operations in 2009, but was halved to 25 Bitcoins in November 2012, and will reduce by 50% approximately every four years.
4 Public key encryption combines a public key and a private key. While the public key is available to anyone, the matching private key is stored securely in the digital wallet and is generally password-protected. Each Bitcoin transaction is signed by the private key of the initiating user, providing mathematical proof that it has indeed originated from the owner of the address, and preventing the transaction from being altered once it has been issued. Since the key pair is mathematically related, any data or information encrypted with a private key may only be decrypted or deciphered with the corresponding public key and vice versa.
5 Double-spending means spending the same digital currency twice, something that is impossible with physical currencies.
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