Code cracking puzzles

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Crack the code breaking puzzles and learn not just about codes but also language, calculating frequencies and percentages.
Learn about:
  • cryptography algorithms
  • frequency analysis
  • algorithmic thinking
  • computational thinking


Puzzle Sheets

christmastreesnowman-PIXABAY1033346Christmas Cryptography

Can you decipher this Christmas word: ZOFLTS ?

The key is to give it a go on your computer when you are bored!

Decrypt a sinister christmas message from Herod

  •   Perhaps you can crack Herod’s message yourself, If not read on and learn about Caesar Ciphers, and cribs, or just imagine you are the  the recipient who knows the key and must just use that key to decrypt it.

The Great Fire of LondonFireOfLondon

  • Here is a message to decipher  hidden in  a description of the Great Fire of London to match the Stuart theme of the cipher.  It uses the Bacon Cipher invented by Sir Francis Bacon.

Bacon not Turkey this Christmaschristmas-pig-PIXABAY152729

  •  Decipher the message hidden in the carol ‘Silent Night’ in this Tudor/Stuart based code-cracking puzzle. It uses the Bacon Cipher invented by Sir Francis Bacon.