Year 9 Encryption

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