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In this paper, the one-sided secrecy of two-way wiretap channel with feedbackis investigated, where the confidential messages of one user through multipletransmissions is guaranteed secure against an external eavesdropper. For onething, one-sided secrecy satisfies the secure demand of many practicalscenarios. For another, the secrecy is measured over many blocks since thecorrelation between eavesdropper's observation and the confidential messages insuccessive blocks, instead of secrecy measurement of one block in previousworks. Thus, firstly, an achievable secrecy rate region is derived for thegeneral two-way wiretap channel with feedback through multiple transmissionsunder one-sided secrecy. Secondly, outer bounds on the secrecy capacity regionare also obtained. The gap between inner and outer bounds on the secrecycapacity region is explored via the binary input two-way wiretap channels. Mostnotably, the secrecy capacity regions are established for the XOR channel.Furthermore, the result shows that the achievable rate region with feedback islarger than that without feedback. Therefore, the benefit role of feedback isprecisely characterized for two-way wiretap channel with feedback underone-sided secrecy.

Effects of Feedback on the One-sided Secrecy of Two-way Wiretap through Multiple Transmissions