DES-based Hash by Wentz Wu, ISSAP, ISSEP, ISSMP CISSP, CCSP, CSSLP, CGRC, SSCP, CC, CISM, CISA, CRISC, CGEIT, PMP, ACP, PBA, RMP, CEH, ECSA

DES is an encryption function, but the DES-based crypt is not DES; the internal function is altered (by the salt, namely), executed 25 times, and, more importantly, the roles of the key and the message are swapped. The end result is that the name “crypt” is improper (though traditional): this is no longer an encryption function; it should be called the “DES-based hash“.

Source: Thomas Pornin