[GreenKeys] [External] Two-tape TTY for crypto

[Jones, Douglas W]

From: Jim Haynes [jhhaynes at earthlink.net] -- Monday, October 12, 2020 6:57 PM

> Of course it was really a hoax.  What they had done was create English and French texts containing exactly the same number of characters. And a hand made key tape that would convert one into the other  ...

Hand-made key tape?  No!  You put the English and French tapes on the 2-input XOR device and let it combine them to make the key tape.  That key tape, input with the English will make French, and visa versa.

      Doug Jones
      jones at cs.uiowa.edu