Date: Fri, 22 Dec 2000 23:21:54 -0800 From: "Crist J. Clark" <cjclark@reflexnet.net> To: Keith Ray <aphex@nullify.org> Cc: freebsd-security@FreeBSD.ORG Subject: Re: IPSec + Racoon: pre-shared key length Message-ID: <20001222232154.I96105@149.211.6.64.reflexcom.com> In-Reply-To: <977521215.3a43ca3fea068@nullify.org>; from aphex@nullify.org on Fri, Dec 22, 2000 at 03:40:15PM -0600 References: <977521215.3a43ca3fea068@nullify.org>
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On Fri, Dec 22, 2000 at 03:40:15PM -0600, Keith Ray wrote: [snip] > 3DES uses 192-bit keys > for a keyspace of 2^192. I believe ESP uses 3DES with three independent keys (as opposed to the two key method) which is a keyspace of 168-bits... But there is an attack of three independent keys which reduces the effective keyspace to what one would naively expect for two independent keys. That's a whole 'nother story tho'. ;) -- Crist J. Clark cjclark@alum.mit.edu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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