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The NSA also has (had?) an internal puzzle in there cryptolog internal magazine. Some have been declassfied at https://www.nsa.gov/news-features/declassified-do
by advisedwang 10y ago
The NSA also has (had?) an internal puzzle in there cryptolog internal magazine. Some have been declassfied at https://www.nsa.gov/news-features/declassified-documents/cryptologs/ https://www.nsa.gov/news-features/declassified-documents/cry.... An example of their puzzles: https://david.newgas.net/nsa-puzzle/ https://david.newgas.net/nsa-puzzle/