[147681] in cryptography@c2.net mail archive
Re: [Cryptography] Crypto Standards v.s. Engineering habits - Was:
daemon@ATHENA.MIT.EDU (Bill Frantz)
Tue Oct 15 19:21:55 2013
X-Original-To: cryptography@metzdowd.com
Date: Tue, 15 Oct 2013 15:15:54 -0700
From: Bill Frantz <frantz@pwpconsult.com>
To: ianG <iang@iang.org>
In-Reply-To: <525CE72D.8010106@iang.org>
Cc: John Kelsey <crypto.jmk@gmail.com>, cryptography@metzdowd.com
Errors-To: cryptography-bounces+crypto.discuss=bloom-picayune.mit.edu@metzdowd.com
On 10/15/13 at 11:56 PM, iang@iang.org (ianG) wrote:
>At a reduction level, we often hope that we can improve a
>cipher by xoring another cipher with it. But this amounts to
>"inventing" a new cipher, so it seems to reduce to a sort of
>absurdium argument that an xoring programmer can outdo a cryptographer.
Well, lets be careful if they are both stream cyphers. And
downright scared if they are both the same stream cypher. :-)
Layering a stream cypher on top of a block mode cypher seems a
better bet. Even if the block mode is CBC. BTW, AES in counter
mode is a stream cypher.
[I like the direction John is proposing, even if I haven't had
time to chase down the modes he's suggesting.]
Cheers - Bill
-----------------------------------------------------------------------
Bill Frantz | I don't have high-speed | Periwinkle
(408)356-8506 | internet. I have DSL. | 16345
Englewood Ave
www.pwpconsult.com | | Los Gatos,
CA 95032
_______________________________________________
The cryptography mailing list
cryptography@metzdowd.com
http://www.metzdowd.com/mailman/listinfo/cryptography
