Japan says Bitcoin not a currency, but taxable (Update)

Bitcoin is not a currency but transactions involving it should be "subject to taxation", Japan's government said Friday, in a move that could pave the way for formal regulations on the troubled virtual unit.

Tokyo bitcoin exchange files for bankruptcy

(AP)—The Mt. Gox bitcoin exchange in Tokyo filed for bankruptcy protection Friday and its chief executive said 850,000 bitcoins, worth several hundred million dollars, are unaccounted for.

Vietnam says bitcoin transactions are illegal

(AP)—Vietnam's communist government said trading in bitcoin and other electronic currencies is illegal, and warned its citizens not to use or invest in them.

Head of troubled bitcoin exchange still in Japan

(AP)—The head of troubled bitcoin exchange Mt. Gox says in a web post that he is still in Japan, and "working very hard" to find a solution to the Tokyo-based organization's problems.

How malware operators use infected computers to mine cryptocoins

A team of computer scientists at the University of California, San Diego, has taken an unprecedented, in-depth look at how malware operators use the computers they infect to mine Bitcoin, a virtual currency whose value is ...

Website of Bitcoin exchange Mt. Gox offline (Update)

(AP)—The website of major bitcoin exchange Mt. Gox is offline Tuesday amid reports it suffered a debilitating theft, a new setback for efforts to gain legitimacy for the virtual currency.

Cyber thieves blamed for Bitcoin heist: researchers

A gang of cyber criminals using an army of infected computers made off with at least $220,000 worth of Bitcoins and other virtual currencies, security researchers said Monday.

MtGox bitcoin plunges as website disappears

The website of Tokyo-based bitcoin exchange MtGox went down on Tuesday after the value of the virtual unit sank to about a quarter of that on other platforms and Japanese regulators said they were unable to step in.

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