Question: 3 [Is substitution cipher semantically secure?] Answer this question using a formal argument. If yes, then use the argument similar below If no, then use

3 [Is substitution cipher semantically secure?] Answer this question using a

3 [Is substitution cipher semantically secure?] Answer this question using a formal argument. If "yes", then use the argument similar below If "no", then use the argument similar below For all A: Adv5ss[A,OTP]=Pr[A(km0)=1]Pr[A(km1)=1]=0 In OTP, as we proved before, these two distributions are the same - Advantage is 0 OTP is semantically secure

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