= {a, b, c), X = {K1, K2, Ka) and e 2.13 Consider a cryptosystem in which 11,2,3, 4). Suppose the encryption matrix is as follows: K11 2 3 K2 2 3 4 K3 3 4 1 Given that keys are chosen equiprobably, and the plaintext probability distribution is Pr[a] = 1/2, Pr[b] = 1/3, Pr[c] = 1/6, compute H(P), H(C), H(K), H(KIC) and H (PIC) Does this cryptosystem has perfect secrecy