Question: Problem 2.2 Is the following scheme perfectly secure? Justify your answer. The message space is M = {0, ..., 4}. Algorithm Gen chooses a uniform

Problem 2.2 Is the following scheme perfectly secure? Justify your answer.

Problem 2.2 Is the following scheme perfectly secure? Justify your answer. The message space is M = {0, ..., 4}. Algorithm Gen chooses a uniform key from the key space {0,...,5}. Enck(m) returns [k + m mod 5], and Deck(c) returns [c k mod 5]

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