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Bitcoin's proof-of-work system requires a problem that is difficult to solve, has a predictable and adjustable difficulty, and allows solutions to be verified e
by dustcoin 14y ago
Bitcoin's proof-of-work system requires a problem that is difficult to solve, has a predictable and adjustable difficulty, and allows solutions to be verified easily. Many hash functions, in Bitcoin's case, SHA-256, meet these requirements. Protein folding and weather prediction do not.