13.5 The protocol referred to in Problem 13.1 can be reduced from seven steps to five, having the following sequence:
(1) A --> B:
(2) B -->KDC:
(3) KDC -->B:
(4) B--> A:
(5) A--> B:
Show the message transmitted at each step. Hint: The final message in this protocol is the same as the final message in the original protocol.
 
 
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