CDR: Re: Permutations in DES
David Honig
honig at sprynet.com
Wed Sep 6 19:51:17 PDT 2000
At 09:08 PM 9/6/00 -0400, Kevin Elliott wrote:
>initial permutations to be in the same category as Blowfish's (and
>derivative algorithm's) time consuming key expansion phase- a neat
>"trick" that does not improve theoretical security but significantly
>increases the difficulty of real world attacks.
They do an *excellent* job of that but hamper key agility,
unless you do something like page state.
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