[9353] in cryptography@c2.net mail archive
Re: NYC events and cell phones
daemon@ATHENA.MIT.EDU (Paul Crowley)
Mon Sep 17 11:23:39 2001
To: Peter Fairbrother <peter.fairbrother@ntlworld.com>
Cc: "Angelos D. Keromytis" <angelos@cs.columbia.edu>,
t byfield <tbyfield@panix.com>,
Cryptography List <cryptography@wasabisystems.com>
From: Paul Crowley <paul@cluefactory.org.uk>
Date: 17 Sep 2001 13:05:59 +0100
In-Reply-To: Peter Fairbrother's message of "Mon, 17 Sep 2001 01:53:03 +0100"
Message-ID: <87n13uowd4.fsf@saltationism.subnet.hedonism.cluefactory.org.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Peter Fairbrother <peter.fairbrother@ntlworld.com> writes:
> Incidently, even the A5/1 algorithm is supposedly not very secure against eg
> LEAs, Corporations, or perhaps even a very dedicated amateur, though I have
> no exact details to hand.
A normal PC with several hundred gigabytes of disk space and two weeks
preprocessing is sufficient to break A5/1 in about two minutes. Some
known plaintext is needed; I don't know whether anyone's measured how
difficult it is to make guesses at knownn plaintext in a cellphone
voice stream.
--
__ Paul Crowley
\/ o\ sig@paul.cluefactory.org.uk
/\__/ http://www.cluefactory.org.uk/paul/
"Conservation of angular momentum makes the world go around" - John Clark
---------------------------------------------------------------------
The Cryptography Mailing List
Unsubscribe by sending "unsubscribe cryptography" to majordomo@wasabisystems.com
