Question: Prove or refute: An encryption scheme with message space M is per- fectly secret if and only if for every probability distribution over M and

Prove or refute: An encryption scheme with message space M is

Prove or refute: An encryption scheme with message space M is per- fectly secret if and only if for every probability distribution over M and every co , ci E l = PrC-C11 C we have Pr[C co Prove or refute: An encryption scheme with message space M is per- fectly secret if and only if for every probability distribution over M and every co , ci E l = PrC-C11 C we have Pr[C co

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