[GreenKeys] Two-tape TTY for crypto

[Nick England]

See the AN/FGQ-1 (PYTHON) entry at the top of this page.
http://www.navy-radio.com/crypto.htm

The manual for the 131B2 table which performed "mixing (modulo 2 addition
(XOR)) is there.

The CSP-2699 Model 14 TD variant for use with the 131B2 is a little further
down the page.

The key tape was later replaced by a TSEC/KW-2 non-tape key generator
(GORGON).

Besides the 131B-2 table there were a couple of other later mixers
including the SSM-3 and SSM-33.

Cheers,
Nick
Nick England K4NYW
www.navy-radio.com


On Mon, Oct 12, 2020 at 3:05 PM Dave Horsfall <dave at horsfall.org> wrote:
>
> I've been reading a bit of crypto stuff lately (one of my hobbies), and
> something caught my eye; apparently Teletype made a box that took two
> tapes: one was the plain/cipher text, and the other was the key, and the
> two were combined with no-carry addition on the individual bits.
>
> Anyone know any more about this?
>
> -- Dave VK2KFU
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