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Through ordinary transmissions over wireless multicast networks are greatlyhampered due to the simultaneous presence of fading and shadowing of wirelesschannels, secure transmissions can be enhanced by properly exploiting randomattributes of the propagation medium. This study focuses on the utilization ofthose attributes to enhance the physical layer security (PLS) performance of adual-hop wireless multicast network over kappa-mu shadow-fading channel underthe wiretapping attempts of multiple eavesdroppers. In order to improve thesecrecy level, the best relay selection strategy among multiple relays isemployed. Performance analysis is carried out based on the mathematicalmodeling in terms of analytical expressions of non-zero secrecy capacityprobability, secure outage probability, and ergodic secrecy capacity overmulticast relay networks. Capitalizing on those expressions, the effects ofsystem parameters, i.e., fading, shadowing, the number of antennas, destinationreceivers, eavesdroppers, and relays, on the secrecy performance areinvestigated. Numerical results show that the detrimental impacts caused byfading and shadowing can be remarkably mitigated using the well-knownopportunistic relaying technique. Moreover, the proposed model unifies secrecyanalysis of several classical models, thereby exhibiting enormous versatilitythan the existing works.

Opportunistic Relay in Multicast Channels with Generalized Shadowed Fading Effects: A Physical Layer Security Perspective