===== Hashcash =====
[[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]]

**Hashcash** is a [[dido:public:ra:xapend:xapend.a_glossary:p:proof_of_work|proof-of-work]] system used to limit email spam and [[dido:public:ra:xapend:xapend.a_glossary:d:dos]] attacks, and more recently has become known for its use in [[dido:public:ra:xapend:xapend.a_glossary:b:bitcoin|bitcoin]] (and other cryptocurrencies) as part of the [[dido:public:ra:xapend:xapend.a_glossary:m:mining|mining]] algorithm.

Source: [[https://hackernoon.com/blockchain-dictionary-f4d098c9ef89]]


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