Is Bitcoin About To Change The World?

The past weeks have seen a surprising meeting of minds between chairman of the US Federal Reserve Ben Bernanke, the Bank of England, the Olympic-rowing and Zuckerberg-bothering Winklevoss twins, and the US Department of Homeland Security. The connection? All have decided it's time to take Bitcoin seriously.

Until now, what pundits called in a rolling-eye fashion "the new peer-to-peer cryptocurrency" had been seen just as a digital form of gold, with all the associated speculation, stake-claiming and even "mining"; perfect for the digital wild west of the internet, but no use for real transactions.

Bitcoins are mined by computers solving fiendishly hard mathematical problems. The "coin" doesn't exist physically: it is a virtual currency that exists only as a computer file. No one computer controls the currency. A network keeps track of all transactions made using Bitcoins but it doesn't know what they were used for – just the ID of the computer "wallet" they move from and to.

Right now the currency is tricky to use, both in terms of the technological nous required to actually acquire Bitcoins, and finding somewhere to spend them. To get them, you have to first set up a wallet, probably online at a site such as Blockchain.info, and then pay someone hard currency to get them to transfer the coins into that wallet.

A Bitcoin payment address is a short string of random characters, and if used carefully, it's possible to make transactions anonymously. That's what made it the currency of choice for sites such as the Silk Road and Black Market Reloaded, which let users buy drugs anonymously over the internet. It also makes it very hard to tax transactions, despite the best efforts of countries such as Germany, which in August declared that Bitcoin was "private money" in which transactions should be taxed as normal.

It doesn't have all the advantages of cash, though the fact you can't forge it is a definite plus: Bitcoin is "peer-to-peer" and every coin "spent" is authenticated with the network. Thus you can't spend the same coin in two different places. (But nor can you spend it without an internet connection.) You don't have to spend whole Bitcoins: each one can be split into 100m pieces (each known as a satoshi), and spent separately.

Although most people have now vaguely heard of Bitcoin, you're unlikely to find someone outside the tech community who really understands it in detail, let alone accepts it as payment. Nobody knows who invented it; its pseudonymous creator, Satoshi Nakamoto, hasn't come forward. He or she may not even be Japanese but certainly knows a lot about cryptography, economics and computing.