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Date: Sat, 2 Oct 2010 06:09:38 +0400
From: Solar Designer <>
Subject: Re: 2ch/4ch-style tripcodes?

On Wed, Sep 29, 2010 at 05:23:34PM -0700, Corbin Simpson wrote:
> Trying to do this "by hand" is pretty easy. I can get around 160K
> trips/s with glibc's crypt() and 250K trips/s with OpenSSL's
> DES_fcrypt(). Pretty decent. However, after reading some literature,
> I'm fairly convinced that my Core i3 is probably capable of squeezing
> out somewhere between 750K-1.5M trips/s, with the proper crypt()
> implementation.

It should do 2M+ trips/s per core.

> I kind of doubt anybody in the community's worked on this specific
> problem, but is there any advice out there for me?

Actually, some Japanese folks did.  Erik has already posted the most
appropriate link:

VecTripper_20090729.tar.bz2 has the source code, and it reuses and even
enhances code from JtR.  In fact, I suspect that Dango-Chu's DES S-boxes
for AltiVec, currently included in JtR 1.7.6 as sboxes-s.c, were
originally created primarily with tripcodes in mind.

That web page also has links to other implementations.

Finally, this lengthy multi-year thread:

has many links to various implementations, intermixed with garbage and
spam comments...

Good luck!


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