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Re: DES-XEX3 was: A little social engineering

William Allen Simpson says:
> My memory (from Schneier, Byte, and CryptoBytes) is that this extends
> the DES 56-bits key strength up to about 120-bits for brute-force, and
> boosts the chosen plaintexts from 2**47 to 2**60 for differential.

If *my* memory serves me, DESX increases the key length against brute
force, but has no effect wrt. differential or linear attack.
Uri		uri@watson.ibm.com

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