On the Secrecy of Interference-Limited Networks under Composite Fading Channels

TL;DR

This paper analyzes the secrecy capacity of interference-limited wireless networks with composite fading, deriving closed-form expressions for secrecy metrics and examining how network geometry influences security performance.

Contribution

It introduces a comprehensive model combining path-loss, shadowing, and Nakagami-m fading, providing new closed-form formulas for secrecy probability metrics in interference-limited settings.

Findings

Secrecy metrics are significantly affected by the spatial arrangement of nodes.

Closed-form expressions enable precise evaluation of secrecy performance.

Network geometry influences the likelihood of non-zero secrecy capacity.

Abstract

This paper deals with the secrecy capacity of the radio channel in interference-limited regime. We assume that interferers are uniformly scattered over the network area according to a Point Poisson Process and the channel model consists of path-loss, log-normal shadowing and Nakagami-m fading. Both the probability of non-zero secrecy capacity and the secrecy outage probability are then derived in closed-form expressions using tools of stochastic geometry and higher-order statistics. Our numerical results show how the secrecy metrics are affected by the disposition of the desired receiver, the eavesdropper and the legitimate transmitter.