Challenging puzzle for experienced crossword solvers
Legendary Ciphers and Secret Codes
A crossword exploring the world’s most famous cryptic codes and historical ciphers.
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Across
- 2. Ancient Spartan transposition tool
- 3. Set of letters used in most classical ciphers
- 4. Cipher combining fractionation and transposition
- 5. Polyalphabetic cipher using a keyword
- 13. Famous US military cryptographic device
- 14. Legendary ciphertext hiding American treasure
Down
- 1. Code using dots and dashes for communication
- 6. First digraph substitution cipher
- 7. Ancient Hebrew substitution cipher with reversed alphabet
- 8. Famous German WWII cipher machine
- 9. US WWII cipher machine rivaling Enigma
- 10. Simple substitution cipher named after a Roman leader
- 11. Simple letter substitution by 13 places
- 12. Code name for an early telegraph cipher system
- 15. Code talkers’ language used in WWII
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