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Try Your Hand at Cryptanalysis

Last year, we challenged you to crack a code created by the “cryptanalysts” in our FBI Laboratory, who are experts in breaking ciphers of all kinds. 


Tens of thousands of you did so. 


Are you ready for round two? We hope so. But bear in mind, this year's code is slightly more difficult.

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

Good luck!

Code graphic

To learn more about code-breaking in the FBI: 

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