Date: Wed, 5 Dec 2007 03:21:56 +0300 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: PS3 MD5 cracking On Tue, Dec 04, 2007 at 04:43:29PM +1300, Russell Fulton wrote: > Reading the paper reports in local computerworld we found that when they > quoted Nick directly he referred to md5 *cycles* per second. My > knowledge of md5 is hazy at best but iirc for each hash there are 64 of > cycles. > > Does this make sense? I'm afraid not. In MD5, there are four "rounds", where each round consists of 16 "steps", although the word "step" is only used in the part of RFC 1321 that describes differences between MD4 and MD5. No "cycles". Moreover, it hardly makes sense to refer to the rate of MD5 rounds or steps computed per second because the four rounds are different - and they are even more different in implementations optimized (or cut down) for cracking just one MD5 hash. Even the number of steps to compute for a given round may be reduced. BTW, I incorrectly referred to the steps as rounds in my previous posting. -- Alexander Peslyak <solar at openwall.com> GPG key ID: 5B341F15 fp: B3FB 63F4 D7A3 BCCC 6F6E FC55 A2FC 027C 5B34 1F15 http://www.openwall.com - bringing security into open computing environments -- To unsubscribe, e-mail john-users-unsubscribe@...ts.openwall.com and reply to the automated confirmation request that will be sent to you.
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