The second 'who' in our who's who of Internet 2.0 is a bit of a mystery. Satoshi Nakamoto is the name used by the creator of bitcoin, the first popular crypto-currency, and with it the blockchain, an immutable ledger that stores a record of every bitcoin transaction ever carried out.
An Australian named Craig Stephen White outed himself as Nakamoto earlier this year, then promptly 'inned' himself when the Australian tax authorities came knocking. In fact, White is just the latest in a long line of suspects and Nakamoto's identity remains a mystery.
Whatever the situation, Nakamoto's pioneering work on the decentralised maths-based currency and its supporting cryptography and ledger has given a huge boost to efforts to alter the underlying architecture of the internet.
A decentralised network has no central control system, so it needs a secure and trustworthy way to account for the data moving across it, and blockchain is a promising option for many.
Bitcoin has also spawned hundreds of other crypto-currencies, some of which are the basis of the internal economies in the new peer-to-peer networks that are starting to appear.
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