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Date: Wed, 11 Apr 2012 14:27:20 +0530
From: Deepika Dutta Mishra <>
Subject: Re: bitslice des

I read the mailing lists, I will take up one of the algorithm soon. Right
now I am going through the DES BS code. Have you compared your code to
openssl implementation (which is not bit sliced)? How much speed up has it
given? I ran the test on my system, for DES I have following result. I
could not understand the meaning of the result, I mean how you calculate
c/s, what is real/virtual and how to relate c/s to encryptions/sec.

Benchmarking: Traditional DES [32/32 BS]... DONE
Many salts:    439104 c/s real, 1514K c/s virtual
Only one salt:    433184 c/s real, 1353K c/s virtual


On Tue, Apr 3, 2012 at 9:21 PM, Solar Designer <> wrote:

> On Tue, Apr 03, 2012 at 08:51:14PM +0530, Deepika Dutta Mishra wrote:
> > I would like to contribute to your work if you require, since bitslicing
> is
> > what i am focusing on if you have any requirement in it I would like to
> > contribute, this will help me also in mastering this technique.
> We had a discussion on this very list with Piyush Mittal regarding
> changing more of the JtR "formats" to use the bitslice DES
> implementation.  (Right now, many formats use non-bitslice DES code from
> OpenSSL instead - I guess primarily because the contributors of those
> did not figure out how to use the bitslice implementation.)  If you're
> interested, please locate and read my replies to Piyush Mittal's many
> postings on the subject.  Something like:
> although I think there were more postings on that topic.
> Additionally, we have a bitslice SHA-256 and SHA-512 task mentioned here:
> Alexander

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