10 questions on the Mt. Gox implosion

Did a spaghetti-like code help bring down the Bitcoin exchange?

By Tim Hornyak and Jeremy Kirk, IDG News Service |  On-demand Software

How do half a billion dollars vanish into thin air? That seems to be what happened at popular Bitcoin exchange Mt. Gox, which made a a bankruptcy protection filing in Japan last week.

The staggering, unprecedented loss of about 850,000 bitcoins, worth roughly US$474 million, has prompted investors, government officials and journalists to scrutinize the Tokyo-based exchange, but clear facts are few. It seems that no one knew exactly what was going on inside Mt. Gox, even CEO Mark Karpeles, who apologized at a press conference for "weaknesses in the system."

The case remains murky but we've taken a stab at answering some of your questions based on what we know so far.

What is Mt. Gox, anyway?

Mt. Gox started as a market for trading cards used in the "Magic: The Gathering" fantasy game, but diversified in 2010 into an exchange for bitcoin, a little-known virtual currency launched a year prior. It rapidly became the dominant bitcoin exchange due to a lack of competitors, and was run by CEO Mark Karpeles, a Frenchman. The site had 1 million customers as of December 2013, according to a document posted on the web last week that purported to be a leaked business plan.

How did it go from bonanza to bust?

Success seems to have bred complacency at the highest levels of Mt. Gox. In June 2011, about $8.75 million in bitcoin was stolen from the exchange through an online attack using stolen passwords. Any security improvements implemented since then were obviously not up to scratch if the latest loss is the result of a massive heist. Anecdotal accounts have suggested a corporate culture that tended toward laissez-faire rather than strict diligence.

Why did Mt. Gox file for bankruptcy?

Mt. Gox filed for bankruptcy protection in Tokyo District Court on Feb. 28, saying it couldn't account for 750,000 of its customers' bitcoins and 100,000 of its own, worth as much as $474 million. The company also can't account for $27.3 million in cash customer deposits.

How do you lose 850,000 bitcoins?

That, of course, is the million-dollar (or bitcoin) question. The coins may be missing due to a long-known security flaw called transaction malleability that can in some cases enable fraudulent withdrawals. Some observers and investors, however, are accusing the company of fraud, even alleging the collapse was an orchestrated scheme. Other commentators have said Mt. Gox had the best intentions but was just poorly managed.

Can you run a company that badly?

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