Re: ask a question about DES

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From: Richard Outerbridge
Date: Sun, 21 Feb 1999 00:00

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1946 bytes

-----BEGIN PGP SIGNED MESSAGE-----

1999-02-21 13:05:28 EDT
Responding to article <7ap9c1$eb7$1@news.seed.net.tw>, by "Jason"
<jason008@ms1.seeder.net> :

DES keys ignore every eighth bit of each byte.  The unused bit may
be used for odd parity detection.  Unhelpfully, the bit that ends up
being ignored is the >least< significant one in normal representation.
For example, the two following 64-bit hex strings are equivalent DES
keys.  Only the first one will pass odd-parity checks.

Key1: 0123 4567 89ab cdef
Key2: 0022 4466 88aa ccee

outer

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-- 
"Just an eccentric soul with a curiosity for the bizarre."
PGPpubkey 1024/0EEAAF21 1994/07/23 <outer@interlog.com>
Fingerprint = 6A89 D49F D3DA 12E4  040A 273B F383 0127

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From: outer@interlog.com (Richard Outerbridge)
Subject: Re: ask a question about DES
Date: 1999/02/21
Message-ID: <outer-2102991317310001@outer.interlog.com>
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References: <7ap9c1$eb7$1@news.seed.net.tw>
Mail-Copies-To: outer@interlog.com
NNTP-Posting-Time: 21 Feb 1999 18:17:23 GMT
Organization: Graven Imagery
Newsgroups: alt.security.keydist,demon.security,demon.security.keys,tw.bbs.comp.hacker,tw.bbs.comp.security

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