(9 points IPSEC, phase 1, main mode, symmetric key option is illustrated below where K h (IC, RC, gab mod p, RA, RB, KAB), and AB is a symmetric key shared by Alice and Bob. IC, CP IC,RC, CS ICRC, ga mod p, RA ICRC, gb mod p, R IC,RC, ice proof A, K) Alice IC,RC, E("Bob", proofR, K) (a) As discussed in class and in the textbook, this protocol fails to provide anonymity. Since main modes are supposed to provide anonymity, this is a significant flaw. Clearly explain why this protocol fails to provide anonymity