Date: Wed, 15 Jun 1994 17:32:24 -0700
From: [email protected]
Are there any implementations of DES-variants that use variable S-boxes?
Well, if you don't use the DES S-boxes then it isn't DES :-)
Variable boxes tend to weaken DES. The DES S-boxes were chosen to
make differential cryptanalysis difficult. Random S-boxes don't tend
to have this desirable property. Use IDEA.
Rick