More on cracking DES algorithm

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Article #1133

#1133

From: Sam Hulick
Date: Wed, 30 Sep 1992 22:39

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NOTE: Yes, you may have noticed I'm posting a lot about breaking DES/UNIX
encryption.  I am not a hacker, I'm merely trying to understand the way it
works and learn exactly how secure this algorithm really is.  I gave up hacking
a long time ago. (:

Let's say someone retreives the DES source code, which is easy enough.  Why
WOULDN'T they be able to take every single mathematical operation, reverse each
one, and then have a "decrypt()"?  I know it's not that simple, but how has DES
made it so even a good mathematician can't just reverse all the operations?

-- 
Sam Hulick          | "The worst sin towards our fellow creatures is not to
shulick@indiana.edu | hate them, but to be indifferent to them: that's the
(NeXTmail welcome)  | essence of inhumanity."  --George Bernard Shaw

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From: shulick@yankton.ucs.indiana.edu (Sam Hulick)
Newsgroups: sci.crypt
Subject: More on cracking DES algorithm
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Date: 30 Sep 92 22:39:57 GMT
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