(Solved): (7 points)a. Using this Playfair matrix: Encrypt this message: Must see you over Cadogan West. Not ...

(7 points)a. Using this Playfair matrix: Encrypt this message: Must see you over Cadogan West. Note: The message is from the Sherlock Holmes story, The Adventure of the Bruce- Partington Plans. b. Repeat part (a) using the keyword largest. c. How do you account for the results of this problem? (6 points) a. How many possible keys does the Playfair cipher have? Ignore the fact that some keys might produce identical encryption results. b. Now take into account the fact that some Playfair keys produce the same encryption results. How many effectively unique keys does the Playfair cipher have?