Physical Layer Security in the Presence of Interference

TL;DR

This paper analyzes how fading and multiple interferers affect physical-layer security, providing a new closed-form expression for secrecy outage probability that aids in designing more secure wireless systems.

Contribution

It introduces a novel closed-form formula for secrecy outage probability considering fading, interferers, and system parameters, enhancing security analysis.

Findings

Interference significantly impacts PHY security.

The derived formula accurately predicts secrecy outage.

Interference must be carefully managed in secure wireless design.

Abstract

We evaluate and quantify the joint effect of fading and multiple interferers on the physical-layer (PHY) security of a system consisted of a base-station (BS), a legitimate user, and an eavesdropper. To this end, we present a novel closed-form expression for the secrecy outage probability, which takes into account the fading characteristics of the wireless environment, the location and the number of interferers, as well as the transmission power of the BS and the interference. The results reveal that the impact of interference should be seriously taken into account in the design and deployment of a wireless system with PHY security.