Bitcoin's proof-of-work model requires energy-sucking computer equipment to solve problems that validate transactions on the blockchain, a process known as mining.

OP_CAT Labs' Liu says Satoshi envisioned Bitcoin to be programmable. To get there, one piece of code needs to be re-enabled. But there are some loud voices in the way.

Developers have directly traded bitcoin for ethereum using an in-progress technology that aims to replace cryptocurrency exchanges with code.

A hacker or hackers sneaked a backdoor into a widely used open source code library with the aim of surreptitiously stealing funds stored in bitcoin wallets, software developers said Monday. The ...