Optical analog computing?
David Honig
dahonig at cox.net
Wed Oct 2 12:54:18 EDT 2002
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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