With the ECB mode, if there is a one-bit error in a block of the transmitted ciphertext, only thecorresponding plaintext block is affected in the decryption. However, in the CBC mode, thiserror propagates. For example, a one-bit error in the transmitted C1 (Slide 10 "Cipher BlockChalning (CBC)" on CSC1474574-Module_06_1.pptx) obviously corrupts the decryption of bothP. and P2a. How many bits in the decrypted P, and P2 at the receiver could be corrupted, respectively,assuming AES is used as the block cipher?b. Are any decrypted blocks beyond P, affected?c. Suppose that there is a one-bit error in the source version of P1. Through how manyciphertext blocks is this error propagated? What is the effect at the receiver?
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