[12525] in cryptography@c2.net mail archive
Re: Columbia crypto box
daemon@ATHENA.MIT.EDU (Pete Chown)
Thu Feb 13 11:04:17 2003
X-Original-To: cryptography@wasabisystems.com
X-Original-To: cryptography@wasabisystems.com
Date: Thu, 13 Feb 2003 10:20:19 +0000
From: Pete Chown <Pete.Chown@skygate.co.uk>
To: "'cryptography@wasabisystems.com'" <cryptography@wasabisystems.com>
In-Reply-To: <v04210100ba6f82d18c8f@[192.168.0.3]>
Arnold G. Reinhold wrote:
> Indeed, but it is important to remember just how thickheaded the
> anti-crypto effort of the '80s and '90s was and how much damage it did.
As a footnote to those times, 2 ** 40 is 1,099,511,627,776. My PC can
do 3,400,000 DES encryptions per second (according to openssl). I
believe DES key setup is around the same cost as one encryption, so we
should halve this if a different key is being used each time. Brute
force of a 40-bit DES key will therefore take about a week. In other
words 40-bit DES encryption is virtually useless, as brute force would
be available to anyone with a modern PC.
--
Pete
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