In the ancient time of Julius Caesar the Roman Empire covered a large region around the mediterian sea and western Europe. News from Rome often took days or even weeks to reach the borders and until the curriers returned there was no possibility to check if the message reached the recipient or was captured by the enemy.

For these reasons it was very important to encrypt important, mainly military, messages to make it impossible for the enemy to use messages he might have captured.

As an algorithm for encryption Julius Caesar used an idea now known as the monoalphabetic cipher. A text was encrypted by rotation all letters in the alphabet for a fixed number of positions.

This CC is based on this historical encryption algorithm, and the task is to encrypt the message without knowing the key.
 




How-To

• The CC can be 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/cc1-1/interface.php the game data in a parser friendly format. Using the call http://www.mystery-twister.com/cc1-1/interface.php?check=ABC... one can check his results.