[2860] in cryptography@c2.net mail archive
Musings on Skipjack
daemon@ATHENA.MIT.EDU (Marcus Leech)
Thu Jun 25 15:49:41 1998
Date: Thu, 25 Jun 1998 14:38:47 -0400
From: "Marcus Leech" <Marcus.Leech.mleech@nt.com>
To: cryptography@c2.net
The analysis of the F() table reveals it to be not particularly optimized
against differential or linear cryptanalysis, but rather the whole algorithm
gets protection from these attacks by virtue of having a lot of rounds.
It's possible to reduce the number of rounds with better-optimized
sboxes, but perhaps the NSA knows something about nonlinear functions
that requires many more rounds, quite apart from DC and LC attacks.
Anyone care to comment?
--
----------------------------------------------------------------------
Marcus Leech Mail: Dept 8M70, MS 012, FITZ
Systems Security Architect Phone: (ESN) 393-9145 +1 613 763 9145
Security and Internet Solutions Fax: (ESN) 395-1407 +1 613 765 1407
Nortel Technology mleech@nortel.ca
-----------------Expressed opinions are my own, not my employer's------
