Cryptography

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Across
  1. 1. Words that mean other words
  2. 3. When the letters are replaced
  3. 7. Covered Writing
  4. 8. Father of History
  5. 10. Created a cipher immune to frequency analysis
  6. 11. First person to use frequency analysis to break ciphers.
  7. 12. Queen who tried to replace Queen Elizabeth
Down
  1. 1. Hidden Writing
  2. 2. Symbols in a cipher that have no meaning
  3. 4. Known for breaking the Vigenere cipher.
  4. 5. When the letters are rearranged
  5. 6. The most famous substitution cipher
  6. 9. A type of substitution cipher that uses a special word to form the cipher.