Hashcash
Hashcash is a proof-of-work system used to limit email spam and denial-of-service attacks, and more recently has become known for its use in bitcoin (and other cryptocurrencies) as part of the mining algorithm. Hashcash was proposed in 1997 by Adam Back and described more formally in Back's 2002 paper "Hashcash - A Denial of Service Counter-Measure".
Q7249984
proof-of-work system
Concept
Q13512320
email spam
Concept
Q131406
denial-of-service attack
Concept
Q131723
bitcoin
Concept
Q13479982
cryptocurrencies
Concept
Q348671
Adam Back
PER
Q357569
Hashcash
Concept
Q357569
Hashcash
Concept
Q357569
Hashcash
Concept
1997-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1997
DATE
2002-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2002
DATE
used by
instance of
notable work
notable work