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- Newsgroups: sci.crypt
- Path: 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
-
- 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.
-