john: john (John The Ripper) john: john: John the Ripper is a fast password cracker, currently available for john: many flavors of Unix. Its primary purpose is to detect weak Unix john: passwords. It supports several crypt(3) password hash types which are john: most commonly found on various Unix flavors, as well as Kerberos AFS john: and Windows NT/2000/XP LM hashes. john: john: john: john: