[GreenKeys] Two-tape TTY for crypto

[nico de jong]

Siemens had a similar unit, the M/190. However, it used XOR logic.
- Nico OZ1BMC



Sendt fra min Samsung Galaxy-smartphone.



-------- Oprindelig besked --------
Fra: Dave Horsfall <dave at horsfall.org>
Dato: 12.10.2020 21.06 (GMT+01:00)
Til: Greenkeys <greenkeys at mailman.qth.net>
Emne: [GreenKeys] Two-tape TTY for crypto

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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