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Prove the second direction of Lemma 2.4, i.e., Prove if an encryption scheme = (Gen, Enc, Dec) is perfectly secret, then Equation (2.1) holds. Pr[Enck
Prove the second direction of Lemma 2.4, i.e., Prove if an encryption scheme = (Gen, Enc, Dec) is perfectly secret, then Equation (2.1) holds.
Pr[Enck (m) = c) = Pr[Enck (m') = c] (2.1)
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