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Secrets of Classic Code Methods is a easy crossword puzzle with 18 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.

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Secrets of Classic Code Methods
Perfect for beginners with simple, common vocabulary
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Across
  • 1. Used in some old ciphers as a code word
  • 2. A mark or symbol that can have secret meaning
  • 4. A secret way to write messages
  • 6. Something kept hidden
  • 8. Code using dots and dashes
  • 10. Famous secret code machine from World War II
  • 14. To keep something hidden or safe
Down
  • 3. Short for substitution, a type of cipher
  • 5. Divide letters into sets to hide text
  • 7. Not easily seen or understood
  • 9. To change a secret message back to normal
  • 11. A simple letter change in ciphers
  • 12. Symbols used to hide meaning
  • 13. First letter of the Greek alphabet often used in ciphers
  • 15. Used to unlock a secret message
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