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Date: Fri, 11 Jan 2013 10:49:34 +0400
From: Solar Designer <solar@...nwall.com>
To: Albert Veli <albert.veli@...il.com>
Cc: john-dev@...ts.openwall.com
Subject: Re: sha1

On Thu, Jan 10, 2013 at 06:43:58PM +0100, Albert Veli wrote:
> I just saw a blogpost linking to this optimized sha1 implementation:
> 
> https://hashcat.net/p12/
> 
> Original blog post here (swedish):
> http://secworks.se/2013/01/nytt-satt-att-optimera-sha-1/
> 
> In short, the creator of hashcat analyzed sha1 and found out 21% of the
> xor-operation cancel out... This leads to the possibility to optimize the
> implementation. I guess the john code could also use this optimization.

This was brought up in here before:

http://www.openwall.com/lists/john-dev/2012/12/11/6

click "thread-next" for replies in that thread.

Alexander

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