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Message-ID: <b9cf357b0721bcd4f59b2e8782f142a7@smtp.hushmail.com>
Date: Thu, 24 May 2012 23:11:46 +0200
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: Can Excessive Rounds make Password cracking Infeasable
On 05/24/2012 11:03 PM, Solar Designer wrote:
> On Thu, May 24, 2012 at 10:49:41PM +0200, magnum wrote:
>> FWIW, some very quick tests on Solar's test gear with the hash above:
>>
>> CPU (8 cores): 4.75 c/s
>> GTX580: 4300 c/s
>> HD7970: 6000 c/s
>>
>> So while the CPU speed is hopeless, using high-end GPU's the speed is
>> not that bad.
>
> These GPU speeds are not realistic. There must be a bug or just lack of
> support for non-default numbers of iterations for this hash type (this
> is something for us to correct if so!)
You are correct. I should have realised that :/
> Also, I guess you were not running Claudio's latest OpenCL code, which
> should do 11.5k c/s on GTX 570 at rounds=5000.
I thought I did a pull. Will re-check later. If rounds is not supported
it really needs to be fixed.
magnum
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