Question: 4.7 Consider the following protocol: (30 points) A-> KDC: IDAl IDe1IN B->A: E(Ks, N2) A->B: E(Ks,f(N2) a. Explain the protocol. b. Can you think of

4.7 Consider the following protocol: (30 points) A-> KDC: IDAl IDe1IN B->A: E(Ks, N2) A->B: E(Ks,f(N2) a. Explain the protocol. b. Can you think of a possible attack on this protocol? Explain how it can be done. C. Mention a possible technique to get around the attack-not a detailed mechanism, just the basics of the idea

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