While the original Caesar cipher is a simple rotation of the alphabet, this cipher can be simply modified to make it secure against simply trying all possible rotations.

What we consider here is a so called monographic substitution cipher, i.e. each letter of the alphabet is replaced by a unique letter in the cipher text. In particular, the same letters of the message are always encrypted to the same letters.
 




How-To

• The CC is started here. The goal is to move the letters on the right to the corresponding letter of the (key)-alphabet using drag and drop.
   
• Non-registered users get a new challenge each time they start the challenge, while registered get the same challenge until it is solved or deleted (see the menu on the right site here).
   
• Registered users can use the save- button in the challenge to save the current state and continue playing later.
   
• The programmers interface returns on http://www.mystery-twister.com/cc1-2/interface.php the game data in a parser friendly format. Using the call http://www.mystery-twister.com/cc1-2/interface.php?check=ABC... one can check his results.