Cryptocurriencies have been around since 1980s . Something called practice of CHAUMAIN BLINDING, which provided a high degree privacy.
IN 1998, WEI DAI'S b-money was the first proposal to introduve the idea of creating money through computing puzzles as well as decentralized concensus.
IN 2005, HAL FINNEY introduced a concept of reusable proofs of work, an idea from b-money together with adam banks computationally.
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