[29244] in cryptography@c2.net mail archive
Re: classical crypto programmatic aids
daemon@ATHENA.MIT.EDU (lists@notatla.org.uk)
Thu Jun 29 19:52:57 2006
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Thu, 29 Jun 2006 21:35:10 +0100
To: solinym@gmail.com, cryptography@metzdowd.com
In-Reply-To: <d4f1333a0606271549s757d5fb7w6790a03e865a62bc@mail.gmail.com>
From: lists@notatla.org.uk
Travis,
> Does anyone here know of any computer-based aids for breaking
> classical cryptosystems? I'm thinking in particular of the ones in
> "Body of Secrets", which are so short that I really hope they're
> monoalphabetic substitutions. But I'm interested in these sorts of
> programs more generally. I could use paper, but it'd be nice if a
> computer could keep track of what I've tried and otherwise ruled out.
> I am aware of the "crypt breaker's workbench", but that's specific to
> classic Unix crypt(3). What else is there?
In the 1990s Remo Pini ("Pini Computer Trading, Switzerland") was distributing
a crypto CD with such things on it. At the time his address was rp@rpini.com
and google suggests some more recent addresses.
> Incidentally, if anyone's interested, on my web page I have an article
> on how I used classical techniques to recover files encrypted with CFS
I thought that was interesting and it's living in my magazine pile.
GCHQ issue a puzzle occasionally (looks like twice a year)
http://www.gchq.gov.uk/codebreaking/index.html
and I tackled the December 2004 one
http://www.gchq.gov.uk/codebreaking/challengedec04.html
like this
http://www.notatla.org.uk/CRYPTO/gchq_puzzle/index.html
using a program of Paul Leyland's off the Pini CD.
---------------------------------------------------------------------
The Cryptography Mailing List
Unsubscribe by sending "unsubscribe cryptography" to majordomo@metzdowd.com
