>Let's also assume that this perfect SHA-4 function is freakishly fast, say, a million times faster than SHA-1 This is why they invented key stretching: http:/

>Let's also assume that this perfect SHA-4 function is freakishly fast, say, a million times faster than SHA-1 This is why they invented key stretching: http://en.wikipedia.org/wiki/PBKDF2 http://en.wikipedia.org/wiki/PBKDF2 Just set number of rounds to 10000000000 instead of, like, 10000 for SHA1.