mt. gox

The U.S. Department of Homeland Security confirmed it has initiated legal action that prompted the Dwolla payment service to stop processing bitcoin transactions.

Nicole Navas, a representative for U.S. Immigration and Customs Enforcement, confirmed the legal action to CNET this afternoon.

Dwolla, a Des Moines, Iowa-based startup, which raised $16.5 million in funding two weeks ago, notified users about the move earlier Tuesday. It blamed the decision on "recent court orders" limiting its ability to send money through Mt. Gox, the largest bitcoin exchange.

"In order not to compromise this ongoing investigation being conducted … Read more

A Bitcoin exchange partnership designed to smooth the trading process and show the security of the virtual currency has apparently collapsed with a lawsuit.

After struggling to crack the U.S. market, Mt. Gox, the world's largest Bitcoin exchange, announced in February that it had reached an arrangement with CoinLab in which the Seattle-based startup would manage the Bitcoin exchange's operations in the U.S. and Canada. Along with the support of Silicon Valley Bank and $500,000 in VC funding, it was hoped that the arrangement would help increase customer confidence in the decentralized digital currency.

However, … Read more

The value of Bitcoin has been skyrocketing of late, gaining more than 50 percent in the last few days, but two unrelated events today knocked the virtual currency back down a bit.

The peer-to-peer currency, which was languishing in the midteens in January, surged past $100 on Monday and was trading as high as $147 today before an hour-long outage at Mt. Gox, the world's largest Bitcoin exchange, pushed its value down to $115. The currency rebounded a bit to close at $123, a 500 percent increase in the past two months.

Mt. Gox initially blamed the outage on … Read more

Bitcoin has staged a dramatic comeback in the past two months, more than doubling its value against the dollar in that time and trading at record levels.

The virtual currency was trading above $32 a share today after languishing in the mid-teens in January. The record was reached on the same day that Mt. Gox, the world's largest Bitcoin exchange, reached an agreement with CoinLab to manage the exchange's operations in the U.S. and Canada.

Bitcoin sprang up in 2009 as a peer-to-peer currency that intentionally avoided the prying eyes of law enforcement officials. In order to … Read more

Bitcoins aren't just an abstract financial instrument living somewhere in the digital ether anymore. They're now a physical currency capable of taking a ride in your pocket or scratching off your lottery tickets.

The physical Bitcoins, called Casascius Bitcoins and created by a guy in Utah named Mike Caldwell, are made of brass, with gold electroplating on the 25 Bitcoin denomination. And, of course, they're tied to the peer-to-peer, open-source digital currency that's been exchanged on the Internet for a while now.

Each coin has a unique Bitcoin address and a redeemable "private key" under a hologram on the coin. That key can be used to redeem the value of the Bitcoins online, but the hologram sticker leaves a honeycomb mark when peeled back, so you'll know if your Bitcoins have been tampered with.

The coins play a function similar to a gift card or certificate with a magnetic strip or bar code. In other words, it provides a tangible means of carrying around the digital key that contains the actual value. There's just one problem--the physical Bitcoins may well be illegal. … Read more