Physical-layer security analysis of SWIPT-assisted relaying networks with full-duplex active jamming and active eavesdropping

This study examines the security of a simultaneous wireless information and power transfer (SWIPT)-assisted relaying network where both the legitimate destination and eavesdropper operate in full-duplex (FD) mode. Unlike conventional models, the architecture includes active jamming at both ends: the destination injects interference to enhance link confidentiality, while the eavesdropper jams to degrade reliability. The paper develops a unified analytical framework with exact closed-form expressions for key metrics, secrecy outage probability (SOP), outage probability (OP), intercept probability (IP), average secrecy rate (ASR), and effective secrecy throughput (EST) over Rayleigh fading channels. These expressions provide precise characterization under various conditions. Analysis reveals asymptotic behavior at high SNRs and highlights interference-limited aspects of FD-enabled energy-harvesting networks. Emphasis is placed on trade-offs from power-splitting at receivers: allocating more harvested power to jamming enhances security but limits resources for decoding, affecting rate and reliability. Monte Carlo simulations confirm close agreement with analytical results, validating the framework. Overall, this work offers an analytical foundation for designing self-sustained secure wireless systems and practical guidelines for advanced security protocols in energy-constrained IoT networks.