Chapter 7 – Confidentiality Using Symmetric Encryption. Confidentiality using Symmetric Encryption. Assume that traditional symmetric encryption is used to provide message confidentiality consider typical scenario What are the possible points of vulnerability. Typical Scenario.
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As number of parties grow, some variant of 4 is only practical solution.
Xn+1 = (aXn + c) mod m
Xi = EKm[i]
Xi = EKm[Xi-1]