[7323] in cryptography@c2.net mail archive
Re: Help add strong crypto to AirPorts
daemon@ATHENA.MIT.EDU (Marc Horowitz)
Fri Jun 16 01:03:22 2000
From: Marc Horowitz <marc@MIT.EDU>
To: William Allen Simpson <wsimpson@greendragon.com>
Cc: Lucky Green <shamrock@cypherpunks.to>,
"Cypherpunks@Openpgp. Net" <cypherpunks@openpgp.net>,
"Cryptography@C2. Net" <cryptography@c2.net>
Date: 16 Jun 2000 00:05:09 -0400
In-Reply-To: William Allen Simpson's message of "Wed, 14 Jun 2000 11:27:22 -0400"
Message-ID: <t538zw6uv7u.fsf@horowitz.ne.mediaone.net>
William Allen Simpson <wsimpson@greendragon.com> writes:
>> What's wrong with the design for IEEE ethernet security, that it cannot
>> be used per user?
Last I checked, ethernet (wireless or not) is a broadcast medium.
Everyone on the "wire" has to share a key if they're going to be able
to talk to each other. What would it mean for each user to have their
own key? If you use session keys, what's a "session"?
If you consider 802.11 crypto to be a mechanism for controlling access
to the link layer, and nothing more, it makes sense. You should be
using end-to-end crypto up in the higher layers, but you knew that.
Marc
