Outer Bound for E-capacity - Equivocation Region of the Wiretap Channel

The basic wiretap channel model is considered. The aim is to maximize the rate of the reliable communication from the source to the legitimate receiver, while keeping the confidential information as secret as possible from the wiretapper (eavesdroper). The E-capacity - equivocation region, which is the generalization of the capacity - equivocation region, is investigated. The outer bound of this region is constructed.