By the end of this protocol: 1. AB:(A,NA) 2. BS:(B,NB,{(A,NA)}KBS) 3. SA:(NB,{(B,K,NA)}KAS,{(A,B,K, NB)}KBS) 4. AB:({(A,B,K,NB)}KBS,{NB}K) State whether B is sure of A's identity, and if so, which single action must B perform to be sure of A's identity? 1- Yes. B receives NA 2- Yes. B sends NB 3- Yes. B sends {(A,NA)}KBS 4- Yes. B decrypts {(A,B,K,NB)}KBS 5- Yes. B receives ({(A,B,K,NB)}KBS,{NB}K) 6- Yes. B sends B's name 7- Yes. B receives A 's name 8- Yes. B encrypts (A,NA) with KBS 9- Yes. B decrypts {NB}K 10- No. None of the actions B performs proves A's identity