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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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