NOTICE TO SITE OWNERS:
This website utilizes a server that will be decommissioned on Oct 31, 2017. If you are the site owner, please visit the Server Decomissioning page for more details.
View Hill Cipher Patent Diagram 1. | Diagram 2. | Diagram 3. | Diagram 4.

Views of the Enigma

View The Poe Cipher

View Simple Simon Cipher (slow!)

Giovanni Battista della Porta's digraphic table

National Security Agency Web Server