A Simple Two-Gear Cipher Machine

This simulation duplicates the action of the two gear polyalphabetic cipher machine described in this article. It uses two wheels, a 29-tooth plaintext wheel and a 26-tooh ciphertext wheel. Enter the plaintext into the form and click "Encrypt", or enter the ciphertext and click "Decrypt".

Don't forget that a special requirement of this cipher is that you always use an asterisk '*' as the second double letter, otherwise the message will not decrypt properly. So when you encrypt 'little" enter it as 'lit*le'.