Choose one

1. AB:A 2. BA:NB 3. AB:{NB}KAS 4. BS:{(A,{NB}KAS)}KBS 5. SB:{(A,NB)}KBS If we were to replace {NB}KAS throughout, by {NB}Kpbs, which one of the following would no more be true: 1- The server S is able to extract NB 2. S can encrypt (A,NB) with KBS 3- B is able to extract NB 4- B can prove A's identity at the end of the protocol 5. A can prove B's identity at the end of the protocol