Maybe - even better - if you could submit only - say - first 8 characters of the SHA1 (and NOT the complete hash) and provide - still say - max 10 "whole" hash

Maybe - even better - if you could submit only - say - first 8 characters of the SHA1 (and NOT the complete hash) and provide - still say - max 10 "whole" hashes found with that 8 char beginning (if more than 10 ask for a ninth char). I mean, here is the SHA1 of my password (not really): d012f68144ed0f121d3cc330a17eec528c2e7d59 This site: https://hashkiller.co.uk/sha1-decrypter.aspx https://hashkiller.co.uk/sha1-decrypter.aspx >We have a total of just over 312.072 billion unique decrypted SHA1 hashes since August 2007. Took exactly 221 ms to reverse it to "pippo".