CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search Not to be confused with Script (disambiguation) . scrypt General Designers Colin Percival First published 2009 Cipher detail Digest sizes variable Block sizes variable Rounds variable In cryptography , scrypt (pronounced "ess crypt" [1] ) is a password-based key derivation function created by Colin Percival, originally for the Tarsnap online backup service. [2] The algorithm was specifically designed to make it costly to perform large-scale custom hardware attacks by requiring large amounts of memory. In 2016, the scrypt algorithm was published by IETF as RFC 7914 . A simplified version of scrypt is used as a proof-of-work scheme by a number of cryptocurrencies , first implemented by an anonymous programmer called ArtForz in Tenebrix and followed by Fairbrix and...