Consider the encryption function for a symmetric cryptosystem E(k, m) described below, where K = M = {0, 1, 2, 3}, C = {0, 1, 2, 3}: E(k, m) = (2 ∗ k + m) mod 4 (a) Give the corresponding decryption function (b) Is this cryptosystem information-theoretically secure(or perfectly secure)? Why or why not?

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Q: RSA cryptosystem

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Q: How

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A: Here is the solution for the above problem.  Answer is : -1

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A: The correct solution for the above mentioned question is given in the next steps for your reference