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This problem concerns the following mode of operation. IV Prove that decryption works correctly. Would the reordering attack described in the previous question work? Consider
This problem concerns the following mode of operation. IV Prove that decryption works correctly. Would the reordering attack described in the previous question work? Consider the following substitution attack scenario (b) (c) (1) Alice encrypts a message (x1, 22) consisting of two blocks, generates cipher text blocks (y/i, y2), and sends to Bob. (2) Oscar has known a pair of plaintext and ciphertext (xh, 31). He intercepts (yi, y2), replaces y with y1 and sends (y1, J2) to Bob. (3) Bob receives (2) Would Bob's decryption result in ( ,T2)? Show all your work. This problem concerns the following mode of operation. IV Prove that decryption works correctly. Would the reordering attack described in the previous question work? Consider the following substitution attack scenario (b) (c) (1) Alice encrypts a message (x1, 22) consisting of two blocks, generates cipher text blocks (y/i, y2), and sends to Bob. (2) Oscar has known a pair of plaintext and ciphertext (xh, 31). He intercepts (yi, y2), replaces y with y1 and sends (y1, J2) to Bob. (3) Bob receives (2) Would Bob's decryption result in ( ,T2)? Show all your work
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