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Hashcash

Ciro Santilli (@cirosantilli, 37) ... List of cryptocurrencies Bitcoin Bitcoin community Bitcoin developer Satoshi Nakamoto Adam Back
Updated 2025-07-16  1 By others on same topic  0 Discussions Create my own version

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Hashcash by Wikipedia Bot 0
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Hashcash is a proof-of-work system designed to limit email spam and denial-of-service attacks. It was created by Adam Back in 1997. The idea behind Hashcash is to require the sender of an email to perform a computational task, which involves calculating a hash that meets certain criteria. This process takes time and computational resources, making it more expensive for spammers to send large volumes of emails.
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