proof of work

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English

Alternative forms

Etymology

Coined in a 1999 paper.[1]

Noun

proof of work (countable and uncountable, plural proofs of work)

  1. (cryptography, cryptocurrencies) A form of cryptographic proof in which a prover proves to verifiers that a certain amount of a specific computational effort has been expended.
    Synonym: PoW
    Coordinate terms: proof of stake, proof of space
    • 2008 October 31, Satoshi Nakamoto, “Bitcoin: A Peer-to-Peer Electronic Cash System”, in metzdowd.com Cryptography Mailing List‎:
      The network timestamps transactions by hashing them into an ongoing chain of hash-based proof-of-work, forming a record that cannot be changed without redoing the proof-of-work.
    • 2018 March 5, Nouriel Roubini, Preston Byrne, “Bitcoin is based on the blockchain pipe dream”, in The Guardian‎:
      Blockchains that use “proof-of-work”, as many popular cryptocurrencies do, raise yet another problem: they require a huge amount of raw energy to secure them.
  2. Used other than figuratively or idiomatically: see proof,‎ of,‎ work.

Translations

See also

References

  1. ^ Markus Jakobsson, Ari Juels (1999) “Proofs of Work and Bread Pudding Protocols”, in Secure Information Networks: Communications and Multimedia Security, Kluwer Academic Publishers, →DOI, pages 258–272

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