[11801] in cryptography@c2.net mail archive
Re: Optical analog computing?
daemon@ATHENA.MIT.EDU (David Honig)
Wed Oct 2 18:55:27 2002
Date: Wed, 02 Oct 2002 09:54:18 -0700
To: "R. A. Hettinga" <rah@shipwright.com>,
Digital Bearer Settlement List <dbs@philodox.com>,
cryptography@wasabisystems.com
From: David Honig <dahonig@cox.net>
In-Reply-To: <p05111a41b9c01780d27c@[66.149.49.6]>
At 11:25 PM 10/1/02 -0400, R. A. Hettinga wrote:
>
>I'm at a speech by Terry Essex, CTO of Essex Corp. He worked on optical
>computing at the NSA for a long time.
>
>"the first computer to crack enigma was optical"
In one of the historical books about crypto, there's a method
described involving punching hollerith cards, stacking them,
and looking through the stack for shared holes. That would
be a parallel optical NAND gate. (And Java compatible if you wipe
up fast enough.)
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