Across
- 3. A backward cipher
- 6. A type of substitution cipher used for data encryption in which the original plaintext structure is somewhat concealed
- 9. A substitution cipher in which each letter is replaced by a sequence of 5 characters
- 10. A morse code cipher
Down
- 1. Uses the same method of encryption but normal word divisions are not retained
- 2. A shift cipher
- 4. A type of monoalphabetic substitution cipher
- 5. A zigzag cipher
- 7. A polygraphic substitution cipher based on linear algebra
- 8. A substitution cipher using normal words