Moderate difficulty suitable for most players
Cipher Chronicles: Enigmas of Cryptology
Challenging puzzle for experienced crossword solvers
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Across
- 1. Encoded puzzle requiring letter substitution to decode
- 2. Cipher technique rearranging letter order without substitution
- 4. Protocol proving truth without revealing information
- 7. Ancient Greek grid cipher, a square encodes letters numerically
- 11. Spiral form inspiring complex cipher visualization
- 13. Algebraic cipher combining linear functions modulo alphabet
- 15. Relating to a cipher machine famous in WWII
- 19. Simple Caesar variant rotating alphabet by thirteen
Down
- 3. Pattern used in rail fence cipher decryption
- 5. Art of hiding messages within innocuous carriers
- 6. Perfectly secure cipher with unrepeatable key
- 8. Cipher replacing elements with others systematically
- 9. Part of asymmetric cryptography pair shared openly
- 10. Five-bit telegraph code predating ASCII
- 12. Algorithmic filter used in prime number generation, cryptanalysis aid
- 14. Statistical method to crack substitution ciphers
- 16. Fundamental binary operation for symmetric encryption
- 17. Rectangular arrangements critical in Hill ciphers
- 18. Polyalphabetic cipher once deemed 'unbreakable'
- 20. Hidden center or cryptographic nucleus (wordplay)
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