There are some interesting ways around government crypto restrictions. Ciphersaber [1] is designed so that you can memorize how to write a program to implement

There are some interesting ways around government crypto restrictions. Ciphersaber [1] is designed so that you can memorize how to write a program to implement it. Bruce Schneier proposed Solitaire, [2] which is designed to be carried out with playing cards rather than on a computer. (Later, Paul Crowley discovered some weaknesses [3] in Solitaire.) Diceware [4] is a method of generating secure passphrases with (you guessed it) regular dice. [1] http://ciphersaber.gurus.org/ http://ciphersaber.gurus.org/ [2] https://www.schneier.com/solitaire.html https://www.schneier.com/solitaire.html [3] http://www.ciphergoth.org/crypto/solitaire/ http://www.ciphergoth.org/crypto/solitaire/ [4] http://world.std.com/~reinhold/diceware.html http://world.std.com/~reinhold/diceware.html