Across
- 5. In cryptography it is the study of how often different letters or phrases are used.
- 6. A type of transposition cipher that encodes the message by placing it into a grid.
- 7. Using more than one alphabet.
- 8. The process of deciphering encrypted data messages.
Down
- 1. A type of transposition cipher that encodes the message by splitting it over rows.
- 2. A substitution cipher where one character of plaintext is substituted for another, which becomes the ciphertext.
- 3. Data that has been encrypted.
- 4. The process of turning plaintext into scrambled ciphertext, which can only be understood if it is decrypted.
- 9. Data in human-readable form.