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Jon Nash's cipher machine
Topic Started: Mar 6 2012, 04:46 PM (891 Views)
coder
NSA worthy
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This is an interesting cipher machine. Maybe even the earliest example of dynamic substitution.

John Nash's cipher machine
quot homines tot sententić
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mok-kong shen
NSA worthy
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Thanks for the link. I was a bit surprised to see that a letter addressed to an official institution was hand-written and in a rather haphazard way. As to its content there happens to be a short comment by someone in NewScientist 25 Feb. p.4-5, who wrote: "This is not a letter that you would have expected to have been written in the '50s".
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