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Article #435

Question about DES s-boxes.

#435
From: Mike Rosing
Date: Thu, 06 Aug 1992 03:56
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Howdy,
	I'm totally new to this topic so please bear with me.  I've
read several Springer-Verlag "lecture notes in computer science"
including "Modern Cryptology A Tutorial" and a few of the Crypto' and
Eurocrypt articles.  Crypto '89 has an article called "Good S-Boxes
are Easy to Find" by C. Adams and S. Tavares.  I'd like to improve the
DES routine I've got working already by substituting the s-boxes with
some of the ideas described in this article.

	The article states that there are 60 s-boxes which meet
the criteria of 1) bijection, 2) nonlinearity, 3) strict avalanche,
and 4) independance of output bits.  Only 3 of these are listed in
the article and I don't have access to the J. of Cryptology to
see if the authors actually got to publish a more detailed description.
Does anyone have a listing of these 60 "perfect" s-boxes?

	Also, the article states "A simple way to extend DES in
the short term might be to standardize a list of good s-boxes and have
as part of the key the choice of s-boxes to use."  Has anyone done
this and would you mind telling me how you used the key to pick
the s-boxes?

	Finally, does anyone know how to get email to the above
authors?  They are listed as being from Queen's University in
Kingston Ontario.  Thanks for any replies!

Patience, persistence, truth,         reality:       mgr@anhep2.hep.anl.gov
Dr. mike                                 UUCP:    uunet!pyramid!cdp!mrosing
IMI, P.O. BOX 2242, Darien IL 60559    bitnet:              mrosing@igc.org
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Path: arc1-ca.pugleaf.net!sparky!uunet!sun-barr!ames!sgi!cdp!mrosing
From: Mike Rosing <mrosing@igc.org>
Newsgroups: sci.crypt
Date: 05 Aug 92 20:56 PDT
Subject: Question about DES s-boxes.
Sender: Notesfile to Usenet Gateway <notes@igc.org>
Message-ID: <1465900002@igc.org>
Nf-ID: #N:cdp:1465900002:000:1508
Nf-From: cdp.UUCP!mrosing    Aug  5 20:56:00 1992
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