Across
- 4. The name we give to the message before it is encrypted
- 5. The type of code invented to be sent via electrical signals
- 6. Encryption machine used in World War 2
- 8. The word used for changing an encrypted message back into plain text
Down
- 1. Mrs Wouldhave's favourite encryption method - uses images to represent each letter
- 2. The person that the Caesar Cipher is named after
- 3. Encryption methods were invented to keep things __________
- 7. The piece of information needed to crack the code