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Re: Short keys * Options, combinations, and negotiations => simplicity

To: Steven Bellovin <smb@research.att.com>
Subject: Re: Short keys * Options, combinations, and negotiations => simplicity
From: Uri Blumenthal <uri@watson.ibm.com>
Date: Tue, 8 Oct 1996 18:50:13 -0400 (EDT)
Cc: ipsec@TIS.COM
In-Reply-To: <199610081917.PAA17438@raptor.research.att.com> from "Steven Bellovin" at Oct 8, 96 03:17:10 pm
Reply-To: uri@watson.ibm.com
Sender: ipsec-approval@neptune.tis.com

Steven Bellovin says:
> Steve Kent had made the point that we had too many protocols that
> differed only in the name of the encryption algorithm.  He was going
> to write a new RFC for any block cipher, into which one can plug the
> names `3DES', `DES', etc., though for something like 3DES a short RFC
> specifying inner vs. outer CBC would be useful.

I think Eli Biham finally broke _all_ of the tripple modes, with the
only exception of ECB-ECB-ECB (i.e. using 3DES as an encryption
engine).

I don't remember exactly,  but if memory serves me, there is one more
mode, that Eli thinks secure...Checking his home page would be useful.
The paper: "Cryptanalysis of multiple modes" or such.
-- 
Regards,
Uri		uri@watson.ibm.com
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