The Solitaire cryptographic algorithm was designed by Bruce Schneier at the request of Neal Stephenson for use in his novel Cryptonomicon, in which field agents use it to communicate securely without having to rely on electronics or having to carry incriminating tools. It was designed to be a manual cryptosystem calculated with an ordinary deck of playing cards.
The Solitaire cryptographic algorithm was designed by Bruce Schneier at the request of Neal Stephenson for use in his novel Cryptonomicon, in which field agents use it to communicate securely without having to rely on electronics or having to carry incriminating tools. It was designed to be a manual cryptosystem calculated with an ordinary deck of playing cards.
Source: Wikipedia "Solitaire (cipher)" · CC BY-SA 4.0
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