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“Cryptanalysis is the is the art and science of analyzing information systems in order to study the hidden aspects of the systems.” – Wikipedia.

Today, cryptanalysis is used by secret societies and organizations to communicate messages without giving clues to others. But the FBI folks are experts at cracking these codes. And they are now offering us help to study, if not all, some basics of it.

In a recent announcement, the FBI announced details about its Cryptanalysis teams, different code systems and how you can learn them. With little bit of patience, it looks possible!

Here are some of the references to different code systems and how they work.

  1. Cipher Systems
  2. Simple Substitution Ciphers
  3. Solving Simple Substitution Ciphers
  4. Keyword Number Ciphers
  5. Telephone Key Pad Ciphers
  6. Masonic Cipher
  7. Tic-Tac-Toe Cipher
  8. Code Systems
  9. Sports Bookmaking Codes
  10. Horse Race Bookmaking Codes
  11. Numbers Bookmaking Codes
  12. Drug Codes
  13. Pager Codes

And here are some code cracking exercises for fun.


Find the answer to this puzzle here (via FBI).