On 6 May 2014 at 8:35, Dave Horsfall wrote: > On Mon, 5 May 2014, Marcus Brinkmann wrote: > > > It is well known that the DES S-Boxes were specifically designed (by > the > > NSA, no less, back in the good ol' days) to protect against that > attack. > > If I recall Schneier, the S-boxes were *modified* by the NSA, not > designed.
More than that, the modifications *improved* the S-boxes --- they made DES resistent to differential attacks that [AFAIK] weren't yet known in the civilian community. I think it was only after a few years that the impact of their changes was understood [and that it was a good thing]. /Bernie\ -- Bernie Cosell Fantasy Farm Fibers mailto:[email protected] Pearisburg, VA --> Too many people, too few sheep <-- _______________________________________________ cryptography mailing list [email protected] http://lists.randombit.net/mailman/listinfo/cryptography
