bitcoin

In early October, a single bitcoin cost less than $5,000 on currency exchange sites. A year ago, one could be had for around $730.

As they say, it's complicated. But blockchain technology could be a boon for the world's poorest places.

An online auction promises to sell NSA files to the highest bitcoin bidder. The site is bizarre, but "teaser" files released as a preview have captured the attention of the cybersecurity world.

The value of the digital currency plunged more than 20 percent after news of the theft broke. Nearly 120,000 bitcoin were stolen; it's not clear who took the currency or how.

"I know now that I am not strong enough for this," says Australian entrepreneur Craig Wright, 45, in a mysterious new blog posting.

From bank regulation to military messaging, the blockchain is offering a wide potential to change the way online transactions and communications are carried out.

Craig Wright, 45, is an entrepreneur whose name has often been mentioned in conversations about bitcoin's creator; in recent months, he was also investigated by tax authorities.

Trying to crack down on sex trafficking, authorities have been going after online ads for adult services. Some in this industry have found a workaround to stay under the radar: cyber currency.

Reports in Wired and Gizmodo pull on various threads to say they may have finally unearthed the identity of the secretive bitcoin creator. The man has drawn attention from Australian tax authorities.