
Adam Back
BuilderCryptob. 1970· British
Cryptographer who in 1997 invented Hashcash — the proof-of-work scheme Bitcoin adopts directly. Co-founder and CEO of Blockstream; cited in the Bitcoin whitepaper. One of the few people Satoshi corresponded with before launch.
| Key Ideas | Hashcashproof-of-worksidechainsBitcoin scaling |
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