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Re: Incorporation of AES into IPSec



On Mon, 6 Dec 1999, John Harleman wrote:
> triple des can support two key sizes--two key or three key. 2key triple
> des=112-bits of symmetric strength, 3key triple des=168-bits.

IPSEC uses only the 3-key form, which has only 112 bits of strength
against meet-in-the-middle attacks. 

                                                          Henry Spencer
                                                       henry@spsystems.net
                                                     (henry@zoo.toronto.edu)



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