From: futplex@pseudonym.com (Futplex)
Date: Tue, 12 Dec 1995 11:35:27 +0800
To: cypherpunks@toad.com (Cypherpunks Mailing List)
Subject: Re: More elveator problem
In-Reply-To: <199512110720.BAA04212@UNiX.asb.com>
Message-ID: <199512110904.EAA15250@opine.cs.umass.edu>
MIME-Version: 1.0
Content-Type: text/plain


The cypherpunk formerly known as Deranged Mutant writes:
> Wait... are unique IDs secret from others? Can they share theirs with
> ea. other without compromising something?
> 
> Maybe using a hash of their combined secret ideas (adding them, or
> mixing the bits... how long is the unique ID?) can be used to generate
> a "key" to exchange other information....

The fundamental problem is that Eve and her sisters get to hear both IDs
when Alice and Bob exchange them. So Eve can also do the hash, XOR, or
whatever. DH skirts this obstacle brilliantly.

-Futplex <futplex@pseudonym.com>