Question: Let us consider the following cryptosystem: P ={a, b, c}; K = {k1, k2, k3}; C = {1, 2, 3, 4}; Pr(a) = 1/4;

Let us consider the following cryptosystem: P ={a, b, c}; K = {k1, k2, k3}; C = {1, 2, 3, 4}; Pr(a) = 1/4; Pr(b) = 1/4; Pr(c) = 1/2 Pr(kl) = 2/3; Pr(k2) = Pr(k3) = 1/6; eki(a)= 1 ek2(a) = 3 eki(b) = 4 ek3(b) = 2 Does this cryptosystem have perfect secrecy? eki (c) = 2 ek2(c) = 3

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