Secure Outage Performance Analysis in Multicasting Wireless Networks over Composite Nakagami-Gamma Fading Channels

The importance of secrecy performance in multicast wireless networks has become paramount as 6 G networks are driving a surge in demand for secure and efficient communication across various applications. To address this challenge, this paper introduces a novel multicast network based on composite Nakagami-Gamma distribution channels, which effectively captures both small- and large-scale fading. Assume that multiple eavesdroppers are attempting to intercept confidential information from the source. To assess secrecy performnce, the analytical expressions for secrecy outage probability for multicasting, probability of non-zero secrecy multicast capacity, and effective secrecy throughput for multicasting are derived in terms of Meijer’s $\mathbf{G}$ function. Numerical results demonstrate that despite the detrimental effect of multiple receivers on secrecy performance, the proposed model can be secured by reducing the severity of fading in the main channel link. Finally, Monte Carlo simulations are employed to verify the accuracy of the analytical results.