TOKYO Mark Karpeles, the former head of defunct bitcoin exchange Mt.Gox, was arrested on Saturday in connection with the disappearance of hundreds of millions of dollars worth of the virtual currency, Japanese media reports said.The French-born Karpeles, 30, is suspected of falsifying data on the outstanding balance of the exchange, at one point the world's largest hub for trading the digital currency, they added.Police were unable to immediately confirm the reports.When it filed for bankruptcy in February 2014, Mt.Gox said 750,000 customer bitcoins and another 100,000 belonging to the exchange were stolen due to a software security flaw.The lost funds represented the equivalent of $480 million at the time of the bankruptcy filing.Gox also said more than $27 million was missing from its Japanese bank accounts.Karpeles, who had blamed hackers for the loss, later said he had recovered 200,000 of the lost bitcoins.Known as a self-proclaimed geek who said he was uncomfortable in his native France and hadn't been back in years, Karpeles became interested in bitcoin when a customer of his web-hosting services wanted to pay in the virtual currency.

Gox subsequently shot from obscurity to dominate global trade in bitcoin, but as early as 2012 employees at the Tokyo-based exchange challenged Karpeles on issues such as whether client money was being used to cover costs.(Reporting by Elaine Lies) Our Standards: The Thomson Reuters Trust Principles Tesla, others seek ways to ensure drivers keep their hands on the wheel WASHINGTON Automakers are using tiny cameras, sensors to track drooping heads, steering wheel monitors and audible alerts to ensure drivers pay attention when using advanced driver assistance systems, like Tesla’s Autopilot, that allow drivers to take their hands off the wheel.Even with Whole Foods, Amazon would need many more warehouses to reshape grocery delivery Inc hopes to revolutionize grocery delivery, then its bid to buy Whole Foods Market Inc for $13.7 billion will be just the start of a long and costly process.Japanese police have arrested the CEO of the failed company MtGox, which was once the world's biggest exchange of the virtual currency, bitcoin.

Mark Karpeles, 30, is being held in connection with the loss of bitcoins worth $387m (£247m, €351m) last February.He is suspected of having accessed the exchange's computer system to falsify data on its outstanding balance.MtGox claimed it was caused by a bug but it later filed for bankruptcy.Japan's Kyodo News said a lawyer acting on Mr Karpeles' behalf denied his client had done anything illegal.Mr Karpeles, who was born in France, is suspected of benefiting to the tune of $1m (£640,000), the agency said.In March 2014, a month after filing for bankruptcy, MtGox said it had found 200,000 lost bitcoins.The firm said it found the bitcoins - worth around $116m - in an old digital wallet from 2011.That brings the total number of bitcoins the firm lost down to 650,000 from 850,000.That total amounts to about 7% of all the bitcoins in existence.Bitcoin is a virtual currency built around a complicated cryptographic protocol and a global network of computers that oversees and verifies which coins have been spent by whom.

attorney in the Southern District of New York said Shrem helped someone he hadn't met in person, Robert Faiella, sell more than $1 million worth of bitcoins to Silk Road customers.Faiella, a 52-year-old Florida man, allegedly ran an underground Bitcoin exchange using the alias BTCKing.Shrem was arrested at John F. Kennedy International Airport in New York on Sunday, and Faiella was arrested at his home in Cape Coral, Fla., on Monday, prosecutors said.que es un bloque bitcoinBoth are charged with conspiracy to launder money and operating an unlicensed money transmitting business.bitcoin gpu linuxAdditionally, Shrem faces a charge for not tipping off the feds to what was allegedly going on.buy bitcoin via skrillShrem, 24, is a major player in the Bitcoin world.bitcoin buyer in pakistan

The BitInstant exchange, based in New York City, lets people buy bitcoins locally at more than 700,000 locations in the United States, as well as Brazil, Russia and elsewhere.It received a $1.5 million investment last year from Cameron and Tyler Winklevoss.Shrem is also vice chairman of the Bitcoin Foundation, one of the currency's biggest advocates.bitcoin 2015 amsterdamThe Winklevoss twins said in an emailed statement that they are "deeply concerned" about Shrem's arrest.bitcoin pool transaction fees"When we invested in BitInstant in the fall of 2012, its management made a commitment to us that they would abide by all applicable laws - including money laundering laws - and we expected nothing less," they said.According to the criminal complaint filed in federal court, Faiella first appeared on Silk Road as BTCKing in late 2011.

The black market website only let people buy and sell goods with bitcoins, and Faiella made a business of exchanging cash for bitcoins.That's where Shrem's bitcoin exchange came in handy.Shrem sold Faiella the bitcoins that eventually made their way to drug buyers and sellers, according to an investigation by the Internal Revenue Service.Though Shrem knew where the money ultimately ended up, he never reported it to the Treasury Department, according to the U.S.Federal documents cite email exchanges between Shrem and Faiella that show how close they worked together.Although Shrem never knew Faiella by his actual name -- only by BTCKing -- the young executive helped the older man avoid trouble.For example, when Faiella's frequent and large cash deposits raised eyebrows at a cash processing company, Shrem advised Faiella on how to avoid sounding alarms.The IRS claims the partners exchanged $1.05 million in bitcoins over a 10-month period ending in October 2012.Faiella eventually ended the partnership with Shrem.

By 2013, he was exchanging more than $20,000 a week for Silk Road clients.To gather evidence against Shrem and Faiella, federal agents posed as Silk Road users and bought bitcoins from Faiella.According to the court documents, agents then traced the money they paid, which led them to Faiella and eventually Shrem.Monday's news is the latest in the Silk Road bust that began in October with the arrest of the website's alleged founder.Federal agents managed to track down the website's server, which housed transaction information and private messages.Some of that information was used as part of the Shrem and Faiella arrests.BitInstant's website was down Monday after the announcement by federal law enforcement.Several lawmakers have called for increased regulation of Bitcoin in light of the currency's heightened privacy, given that they can be traded without using names and are difficult to trace to an individuals.During an interview with Russian media news group RT last year, Shrem called the current financial regulations "crazy."