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| Jon Nash's cipher machine | |
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| Tweet Topic Started: Mar 6 2012, 04:46 PM (891 Views) | |
| coder | Mar 6 2012, 04:46 PM Post #1 |
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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 | Mar 7 2012, 09:51 PM Post #2 |
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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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