Can You Crack a Code?

Try Your Hand at Cryptanalysis

Try your hand at cracking the code.

The cryptanalysts in our FBI Laboratory are pros at code-cracking…but it has been a few years since we have challenged you to give it a go.

We’ve done it a bit differently this time around, creating our first dot code. Good luck!

To reveal the hidden message, go to the bottom of this page. 

To learn more about the types of ciphers and codes that terrorists, spies, and criminals use to conceal their communications, see the article “Analysis of Criminal Codes and Ciphers” from our Forensic Science Communications publication. You can also read about famous cases over the years in the article, “Code Breaking in Law Enforcement: A 400-Year History.”

And feel free to try your hand at our previous code quizzes:

Various Ciphers


The deciphered code reads as follows: “This time we used dot codes for each alphabet character. A little harder perhaps. Well done if you were able to solve it.”