Home News Stories 2007 November Cryptanalysis Challenge 2007
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Cryptanalysis Challenge 2007

Can You Crack a Code?
Try Your Hand at Cryptanalysis


The “cryptanalysts” who work in our FBI Laboratory are experts in breaking codes and ciphers of all kinds, but this time we asked them to create one for us just for fun.

Your mission—if you choose to accept it—is to crack the code below and reveal the hidden message.

Hint: if you want a primer on basic cipher systems and how to break them, see the article Analysis of Criminal Codes and Ciphers.

And if you’re a youngster, we recommend that you start with the code on our Kids’ page.

Good luck!


To learn more about code-breaking in the FBI: