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Path: utzoo!watmath!clyde!burl!ulysses!allegra!don
From: don@allegra.UUCP (D. Mitchell)
Newsgroups: net.crypt
Subject: Lucifer and DES
Message-ID: <2384@allegra.UUCP>
Date: Fri, 6-Apr-84 00:47:05 EST
Article-I.D.: allegra.2384
Posted: Fri Apr  6 00:47:05 1984
Date-Received: Sat, 7-Apr-84 04:17:49 EST
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 13

With the source to Lucifer published, I have a few comments.  Lucifer
is an ancestor of DES.  I have heard rumors that it can be broken by
Key Reestimation.

For you would-be crypto hackers, let me tantalize you with the
following fact.  I have an implementation of DES written in C that
encrypts a block in 1 millisecond on a VAX 780 (8000 chars/sec).  I
guess I should see if I can get it released for you all.  I honestly do
not think it can be done faster, but it took a long time for me to see
the trick to go beyond about 3 or 4 milliseconds per block.  So, as
they say at IBM:

			THINK!