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Everything about Two-square cipher

Encryption technique

The Two-square cipher, also called double Playfair, is a manual symmetric encryption technique. It was developed to ease the cumbersome nature of the large encryption/decryption matrix used in the four-square cipher while still being slightly stronger than the single-square Playfair cipher. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Two-square cipherA 5-minute orientation
  2. Pick up a classic book: Codes and CiphersThe most-reprinted book on the subject
  3. Read the landmark paper: A Novel Image Encryption Algorithm Based on the Two-Dimensional Logistic Map and the Latin Square Image CipherCited 32 times
  4. Go sideways: Four-square cipherA closely related topic
  5. Go sideways: Classical cipherA closely related topic

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🏆 Landmark papers (most cited)

📚 Books worth reading

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