From: Julian Assange <proff@suburbia.net>
To: perry@piermont.com
Message Hash: f2b0f401291d2f41df43c4335eebd6c7cec2c20eeb5eee96c69f8cbe1a29196b
Message ID: <199607231619.CAA18593@suburbia.net>
Reply To: <199607231338.JAA15819@jekyll.piermont.com>
UTC Datetime: 1996-07-24 12:57:56 UTC
Raw Date: Wed, 24 Jul 1996 20:57:56 +0800
From: Julian Assange <proff@suburbia.net>
Date: Wed, 24 Jul 1996 20:57:56 +0800
To: perry@piermont.com
Subject: Re: Brute Force DES
In-Reply-To: <199607231338.JAA15819@jekyll.piermont.com>
Message-ID: <199607231619.CAA18593@suburbia.net>
MIME-Version: 1.0
Content-Type: text
>
>
> "Peter Trei" writes:
> > The fastest general purpose, freely available des implementation I'm
> > aware of is libdes. by Eric Young. With this, I can do a set_key in
> > 15.8 us, and an ecb_encrypt in 95 us/block. That adds up to
> > about 9,000 keytests/sec (this is on a 90 MHz P5, running NT).
>
> I'll point out that like most DES implementations, Eric's tries to
> spend a lot of time in key setup to save time later on in
> encryption/decryption. This tradeoff would probably be very different
> if you didn't plan on trying more than one or two blocks of decryption
> after getting a key.
>
> Perry
90 us is several times longer than 15.
--
"Of all tyrannies a tyranny sincerely exercised for the good of its victims
may be the most oppressive. It may be better to live under robber barons
than under omnipotent moral busybodies, The robber baron's cruelty may
sometimes sleep, his cupidity may at some point be satiated; but those who
torment us for own good will torment us without end, for they do so with
the approval of their own conscience." - C.S. Lewis, _God in the Dock_
+---------------------+--------------------+----------------------------------+
|Julian Assange RSO | PO Box 2031 BARKER | Secret Analytic Guy Union |
|proff@suburbia.net | VIC 3122 AUSTRALIA | finger for PGP key hash ID = |
|proff@gnu.ai.mit.edu | FAX +61-3-98199066 | 0619737CCC143F6DEA73E27378933690 |
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