Outage Performance of Two-Way Relaying Secure Multicast Networks Using Fountain Codes and Digital Network Coding

This paper studies secure multicast networks utilizing two-way relaying with Fountain codes. In this proposed framework, a node S and a group of nodes exchange Fountain packets through a common relay, in the presence of a passive eavesdropper. Our scheme employs three-phase digital network coding and randomize-and-forward techniques. Each node endeavors to collect sufficient Fountain packets to reconstruct the desired data. This paper assesses the performance of the proposed scheme using metrics such as outage probability, intercept probability, system outage probability, and system intercept probability, over Rayleigh fading channels. The findings reveal a trade-off between the outage performance and the intercept performance. Additionally, system parameters such as the relay's position, and the number of Fountain packet transmission significantly impact the system performance.