Fig. 1

Wiretap channel model assuming a concatenated coding scheme, where the outer code is for secrecy and the inner code is for reliability. Note that the inner code is marked as optional, and if it is removed, then this model reduces to the traditional wiretap channel model. The new metrics presented in this work are BE-CDF ^bc (where bc indicates before code) and BER-CDF ^ac (where ac indicates after code)