Cryptocurrency blockchain

Blockchain, a popular provider of digital Bitcoin wallets, recently launched a U.S. cryptocurrency exchange service that aims to compete with entrenched rivals such as Coinbase.

Currently, Blockchain is better known for its wallet service, which lets consumers manage their cryptocurrency holdings such as Bitcoin and Ethereum with their own private cryptographic keys. (Coinbase, by contrast, offers to store private keys—which are needed to access and transact in cryptocurrency—on behalf of its customers.)

COMPUTING POWER
While the hijacking of most devices happens without their owners knowing, one site -- Salon. com -- now tells its readers they can avoid seeing ads if they let it mine Monero using their computing power.