Solitaire (cipher)

Solitaire, named after the card game Solitaire, is an encryption algorithm that was developed by Bruce Schneier.

This symmetric algorithm used to generate the key, a card game with 52 cards plus two jokers. The special feature should be that the algorithm may be relatively safe, but still "manually" can be used ( without a computer or other technical aids to calculation ). Shortly after the publication of a vulnerability in the algorithm was found and published.