technical DES stuff

Trent Piepho (
Wed, 2 Jul 1997 15:41:16 -0700 (PDT)

Since this list seems to be winding down, I wondered if anyone knew of a place
to talk about the technical issues of cracking DES?

I wanted to design a DES cracking ASIC as a class project, but the professor
said it was too easy?!, we did an 8-bit CPU instead. I'd still like to work
on a DES cracking chip, maybe make it a senior project or something. I wonder
where I could find out about ways to speed up the search from the obvious
method. I think I read on this list that it possible to eliminate a key after
12 rounds instead of 16. I can see how to do it in 15, but not 12. I know
most speedups are "software" things and don't apply to a hardware
implementation, where P-boxes are free and a 48-bit XOR is just as fast as a
32-bit XOR.

|Gazing up to the breeze of the heavens \ on a quest, meaning, reason |
|came to be, how it begun \ all alone in the family of the sun |
|curiosity teasing everyone \ on our home, third stone from the sun. |
|Trent Piepho ( -- Metallica |