Secure Semantic Communication over Wiretap Channel

Semantic communication, an emerging feature for future networks like 6G, emphasizes message meaning. Yet, the open nature of a wireless channel poses security risks for semantic communications. In this paper we derive information-theoretic limits, considering the semantic source model within a wiretap channel framework. Under separate equivocation and distortion conditions for semantics and observed data, we present the general outer and inner bounds of the region. We also reduce the general region to a case of Gaussian source and channel and provide numerical evaluation.