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Article #2291Re: Status of DES, or "Is the DES Standard PD?"
From: Steven Bellovin
Date: Thu, 17 Dec 1992 00:37
Date: Thu, 17 Dec 1992 00:37
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In article <1992Dec16.161414.22709@guinness.idbsu.edu>, betz@gozer.idbsu.edu (Andrew Betz) writes: > i would agree. if the government "pushes" a particular encryption > scheme, it's probably because they're able to crack it. Remember that at the time, there were two competing interests, even in the government. Sure, part of NSA wanted to be able to read DES. But another part really wanted to guard commercial American communications from the Soviets -- remember those microwave antennas on top of their embassy? (The balance seems to have shifted, with things like civilian- grade STU-IIIs in sealed boxes being pushed.) > seems like i > remember reading somewhere that one of the criticisms of DES is > that nobody's quite sure where the S-boxes came from...furthermore, > they're non-random, leaving a possible trapdoor somewhere. We now know -- they were designed by IBM, not NSA, to resist differential cryptanalysis.
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Newsgroups: sci.crypt Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!uwm.edu!linac!att!att!dptg!ulysses!ulysses!smb From: smb@research.att.com (Steven Bellovin) Subject: Re: Status of DES, or "Is the DES Standard PD?" Message-ID: <1992Dec17.003701.24851@ulysses.att.com> Date: Thu, 17 Dec 1992 00:37:01 GMT References: <Bz98An.BLJ@dcs.ed.ac.uk> <9212142000.AA46814@chaos.intercon.com> <1992Dec16.161414.22709@guinness.idbsu.edu> Organization: AT&T Bell Laboratories Lines: 18