Re: Nortel CES (3DES version) offers false sense of securitywhen usi ng IPSEC

[Valdis Kletnieks <Valdis.Kletnieks () VT EDU>]

On Wed, 28 Feb 2001 09:36:27 EST, Valdis Kletnieks <Valdis.Kletnieks () VT EDU>  said:

> I seem to remember Schneier's "Applied Cryptography" discussing this.  In any
> case, the reason that triple-DES is limited to an *effective* 112 bits
> of key is that DES is a "group".  To sum up multiple pages of math, this

Moral. Always proofread it *again*.  The math follows from the fact
that DES is *NOT* a group.  I've already had 2 people notice I missed
the '*NOT*'. ;(

/Valdis (who needs to double-check his caffeine content before hitting send)

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