![]() An agent might be in a situation where he just does not have access to a computer, or may be prosecuted if he has tools for secret communication. The system is called “Solitaire” (in the novel, “Pontifex” is a code name intended to temporarily conceal the fact that it employs a deck of cards) and I designed it to allow field agents to communicate securely without having to rely on electronics or having to carry incriminating tools. ![]() These two characters go on to exchange several encrypted messages using this system. In Neal Stephenson’s novel Cryptonomicon, the character Enoch Root describes a cryptosystem code-named “Pontifex” to another character named Randy Waterhouse, and later reveals that the steps of the algorithm are intended to be carried out using a deck of playing cards. This page has been translated into German by Nils Plaumann, into French by Fernandes Gilbert, into Spanish by Jesús Cea Avión, into Italian by Silvio Coccaro, and into Czech by Michal Altair Valášek. Version 1.2, 5/26/99 Designed by Bruce Schneierįeatured in Neal Stephenson’s Cryptonomicon ![]() Home Academic The Solitaire Encryption Algorithm ![]()
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