In one of the applications , it is actually good : the password-hashing method used in OpenBSD uses an algorithm that comes from Blowfish which makes use of the slow key schedule ; the idea is that the extra computational effort required gives protection against dictionary attacks . In one application , it is actually a benefit : the password-hashing method used in OpenBSD uses an algorithm derived from Blowfish that makes use of the slow key schedule ; the idea is that the extra computational effort required gives protection against dictionary attacks .