On 23.01.2010 02:13, Wan-Teh Chang wrote: > On Fri, Jan 22, 2010 at 2:13 PM, Robert Relyea <[email protected]> wrote: >> >>> Also, 2 DES is vulnerable to the meet-in-the-middle attack: >>> http://en.wikipedia.org/wiki/Meet-in-the-middle_attack >>> >> Do you mean 'naive' 2 DES? real 2 des is: >> >> C = Ek1(Dk2(Ek1(P))) > > Bob, yes, I mean naive 2 DES. Thanks for the clarification.
For the sake of clarity: Ek1(Dk2(Ek1(P))) is actually *3* DES with keying option 2 (aka "2-key triple-DES"). I don't think that "2 DES" has ever been defined in any standard. Kaspar -- dev-tech-crypto mailing list [email protected] https://lists.mozilla.org/listinfo/dev-tech-crypto
