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Date: Mon, 27 Jun 2011 13:29:18 +0400
From: Solar Designer <>
Subject: Re: brute force attack of an Unix crypt

Martin -

On Mon, Jun 27, 2011 at 02:06:27AM +0300, Martin T wrote:
> Checking the CPU usage of my 4-core Xeon X3220(4x 2.4GHz) processor, I
> found out, that I had started an brute force attack at the beginning
> of February(!). I had dedicated an entire CPU core for this process:

Oh, if you deliberately only dedicated one CPU core for this, then
please disregard my suggestion to use an OpenMP-enabled build.  But do
use a more optimal build otherwise - perhaps with the
john-1.7.8-fast-des-key-setup-3.diff patch and using the linux-x86-64
make target.  It will do around 2.7 million c/s on one CPU core, and it
supports the Idle setting (unlike an OpenMP-enabled build).


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