From: Joseph Block <jpb@gate.net>
Date: Tue, 26 Jul 94 20:12:02 PDT
To: norm@netcom.com (Norman Hardy)
Subject: Re: CYPHERPUNKS TO THE RESCUE
In-Reply-To: <199407261637.JAA21688@netcom.netcom.com>
Message-ID: <199407270309.XAA39796@inca.gate.net>
MIME-Version: 1.0
Content-Type: text


Re:
> P.S. Better yet: There is no need of Public key technology. It suffices for
> the car unit to send DES(k, n) on the nth transmission. k is a constant
> secret key shared between car unit and garage unit. Garage unit decodes and
> verifies that n is greater than it has seen before.

The only problem with this is that you are limited to one remote per base
station.

jpb