Without Trusted Third Party-Version 2 Alice A Bob n (n KAB Question:What is wrong with this authentication protocol? -Answer:no session key is established,and no mutual authentication. -How to fix this problem?-Add session key kab and a nounce m from Alice 44 Without Trusted Third Party – Version 2  Question: What is wrong with this authentication protocol? ─ Answer: no session key is established, and no mutual authentication. ─ How to fix this problem? - Add session key kab, and a nounce m from Alice Alice A Bob n {n}KAB