Crptography Fundamentals

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Across
  1. 3. Coded message
  2. 5. Perfect encryption method using random key
  3. 6. Attack using letter count statistics
  4. 9. Study of principles/methods of deciphering ciphertext without knowing key
Down
  1. 1. Scientific study of cryptography
  2. 2. Provides the techniques that underpin most information security technologies
  3. 4. Encrypt the word "hosted" using vigenere cipher with a key of “bc”
  4. 7. Info used in cipher known only to sender/receiver
  5. 8. A modern symmetric block cipher