Question: 3. (10 points) For a Diffie-Hellman key exchange, Assume Alice and Bob share a symmetric key KAB. Also assume Alice has a pair of D-H

3. (10 points) For a Diffie-Hellman key exchange, Assume Alice and Bob share a symmetric key KAB. Also assume Alice has a pair of D-H keys, A and gA, and similarly Bob has a pair of D-H keys B and gB. Design a way so that Alice and Bob can run the D-H key exchange protocol without worrying about man-in-the-middle attacks. Draw a diagram to illustrate your design.

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