[11719] in cryptography@c2.net mail archive
Re: unforgeable optical tokens?
daemon@ATHENA.MIT.EDU (eli+@zimbs4.srv.cs.cmu.edu)
Sat Sep 21 02:51:33 2002
To: crypto list <cryptography@wasabisystems.com>
Date: Sat, 21 Sep 2002 02:33:40 -0400 (EDT)
In-Reply-To: <8765x0skz9.fsf@snark.piermont.com> from "Perry E. Metzger" at Sep 20, 2002 12:07:38 PM
Reply-To: eli+@cs.cmu.edu
From: eli+@zimbs4.srv.cs.cmu.edu
Perry E. Metzger wrote:
> An idea from some folks at MIT apparently where a physical token
> consisting of a bunch of spheres embedded in epoxy is used as an
> access device by shining a laser through it.
I can't dig up the memory, but I think I heard of a similar idea --
random structure in transparent solid, difficult to copy -- used in
some kind of tag or seal for nuclear security. Can anyone remind me
what this might have been?
--
Eli Brandt | eli+@cs.cmu.edu | http://www.cs.cmu.edu/~eli/
(finished Ph.D., woohoo; looking for good work in the Seattle area)
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