Question: (1) Given: Cipher-Block Chaining (CBC) is typically used for Block Ciphers. Idea is to send only one random value along with the very first message,

(1) Given: Cipher-Block Chaining (CBC) is typically used for Block Ciphers. Idea is to send only one random value along with the very first message, and then have the sender and receiver use the computed coded blocks in place of the subsequent random number.\ Find: What is (a) the formula to generate the ith ciphertext block [ i.e., c(i)] in the sender side, and (b) the formula to decrypt C(i) & obtain the cleartext block [i.e., m(i)] in the receiver side.

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