"BITCOIN, the
world’s “first decentralised digital currency”, was launched in 2009 by a
mysterious person (or persons) known only by the pseudonym Satoshi Nakamoto. It
has been in the news this week as the value of an individual Bitcoin, which was
just $20 at the beginning of February, hit record highs above $250, before
falling abruptly to below $150 on April 11th. What exactly is Bitcoin, and how
does it work?
Unlike traditional currencies, which are issued by central banks, Bitcoin has no central monetary authority. Instead it is underpinned by a peer-to-peer computer network made up of its users’ machines, akin to the networks that underpin BitTorrent, a file-sharing system, and Skype, an audio, video and chat service. Bitcoins are mathematically generated as the computers in this network execute difficult number-crunching tasks, a procedure known as Bitcoin “mining”. The mathematics of the Bitcoin system were set up so that it becomes progressively more difficult to “mine” Bitcoins over time, and the total number that can ever be mined is limited to around 21m. There is therefore no way for a central bank to issue a flood of new Bitcoins and devalue those already in circulation."
http://www.economist.com/
Unlike traditional currencies, which are issued by central banks, Bitcoin has no central monetary authority. Instead it is underpinned by a peer-to-peer computer network made up of its users’ machines, akin to the networks that underpin BitTorrent, a file-sharing system, and Skype, an audio, video and chat service. Bitcoins are mathematically generated as the computers in this network execute difficult number-crunching tasks, a procedure known as Bitcoin “mining”. The mathematics of the Bitcoin system were set up so that it becomes progressively more difficult to “mine” Bitcoins over time, and the total number that can ever be mined is limited to around 21m. There is therefore no way for a central bank to issue a flood of new Bitcoins and devalue those already in circulation."
http://www.economist.com/
