Evaluating Physical Layer Security in Dual-Hop Relay Networks over Composite Rayleigh-Gamma Fading Channels

With the growing importance of security in advanced communication systems, researchers are exploring innovative strategies to enhance the performance of next-generation wireless networks. This paper proposes a relay-based dual-hop network operating over composite Rayleigh-Gamma fading channels, designed to enhance security against eavesdropping attacks. We derive novel analytical expressions for the secrecy outage probability in terms of Meijer’s G and Fox’s H functions to evaluate the secrecy performance. To validate the analytical results, Monte Carlo simulation is performed. The numerical analysis demonstrates that system security improves significantly with higher fading parameters and reduced path loss in the main communication channel. However, the system’s vulnerability increases as the fading parameter of the eavesdropping channel grows, highlighting the critical interplay between channel conditions and security performance.