From: Adam Back <aba@dcs.ex.ac.uk>
Date: Mon, 19 Jan 1998 06:16:28 +0800
To: ravage@ssz.com
Subject: Re: Signed document - a thought...
In-Reply-To: <199801181631.KAA17197@einstein.ssz.com>
Message-ID: <199801182106.VAA00440@server.eternity.org>
MIME-Version: 1.0
Content-Type: text/plain



Sounds like you are describing something which is a variant of an
interlock protocol.  The idea of an interlock protocol is that you
send out first a hash of what you are intending to publish.

The MITM has a problem in deciding what to publish, because they have
to publish _a_ hash, but they don't know what it should be of.  

Adam