information security

the options are none,all, and some for each of the questions

Q15.1) Consider using CBC to encrypt 4 plaintext blocks, P0, P1, P2, P3 and get C0, C1, C2, C3, respectively. I. When encrypting, if X is used instead of P0 accidentally, then of the resulting C s will be different. II. When decrypting, if X is used instead of CO accidentally, then of the resulting P's will be different. [ Select ] none all some Q15.2) Justify your answer in Q15.1. That is, for each blank, if you choose "all" or "none", explain why; if you choose "some", explain which ones will be different. (each 1.5 pts)