(Bo fbtz djqifs up csfbl!) How easy is it to crack a simple cipher? This feature lets you find out. On the following page is a secret message encrypted using a cipher. The cipher's key is ...

Bill Cipher survived Weirdmageddon with the help ... allowing popular fan theories to predict things like how Stan had a ...

In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair ... we need to prepare the plaintext message for encryption. To encrypt "THIS SECRET MESSAGE IS ENCRYPTED," break it ...