Is this implemented by Facebook holding 3 hashes of your password? It doesn’t save your actual password clear text (or encrypted clear text), does it?
A related question: when a password system tells me I need to change my password, and it has to differ by 3 letters from my previous password, is that system storing my password text rather than the hash of the password? Is that safe?
A related question: when a password system tells me I need to change my password, and it has to differ by 3 letters from my previous password, is that system storing my password text rather than the hash of the password? Is that safe?