Topic: muha meds disposable

Hashcash is a proof-of-work system used to restrict electronic mail spam and denial-of-service attacks. Back's 2002 paper "Hashcash - A Denial of Service Counter-Measure". In Hashcash the client has to concatenate a random number with a string a number of times and hash this new string. It then has to do so over and over till a hash beginning with a sure number of zeros is discovered. 1992 paper "Pricing through Processing or Combatting Junk Mail". Hashcash is a cryptographic hash-based proof-of...