[16787] in cryptography@c2.net mail archive
Re: Is 3DES Broken?
daemon@ATHENA.MIT.EDU (bear)
Wed Feb 2 18:26:57 2005
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Wed, 2 Feb 2005 10:32:53 -0800 (PST)
From: bear <bear@sonic.net>
To: "Steven M. Bellovin" <smb@cs.columbia.edu>
Cc: Aram Perez <aramperez@mac.com>,
Cryptography <cryptography@metzdowd.com>
In-Reply-To: <20050201033853.C55B43BFED4@berkshire.machshav.com>
On Mon, 31 Jan 2005, Steven M. Bellovin wrote:
<snip re: 3des broken?>
>>[Moderator's note: The quick answer is no. The person who claims
>> otherwise is seriously misinformed. I'm sure others will chime
>> in. --Perry]
>
>I'll be happy to second Perry's comment -- I've seen no evidence
>whatsoever to suggest that it's been broken. But there are some
>applications where it's a bad choice for cryptographic reasons.
>
>When using CBC mode, one should not encrypt more than 2^32 64-bit
>blocks under a given key.
I think you meant ECB mode?
whichever it is, as you point out there are other and more secure
modes available for using 3DES if you have a fat pipe to encrypt.
Bear
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