Choose all true statements about the mode of operation given above. (1) The encryption scheme is deterministic (i.e. identical plaintext blocks result in identical ciphertext blocks). (2) The scheme is resistant against the reordering attack. (3) The scheme is resistant against the substitution attack.

(4) It is a stream cipher. (5) Ciphertext blocks are independent. I.e. Changing a block does not affect other blocks. (6) Key stream blocks (Si) can be precomputed and stored before encryption session begins.

This problem concerns the following mode of operation