QUESTION 4 (a) Compare Symmetric and Asymmetric encryption under six appropriate headings. (6 marks) (b) (1) Show clearly how the following plaintext: MeetBankThree Thirty would be converted into ciphertext using the Caesar Cipher and a key of 5. (6 marks) (ii) Give three reasons why this encrypted message would be insecure when in transit over a network. (3 marks) (c) Given the message 1011110' is to be transmitted over a data link. The agreed generator polynomial is X2 + 1. Show the calculation and the frame to be transmitted. (5 marks) (ii) Show how the receiver can verify the message when it is correctly received. (5 marks) Total (25 marks)