An Overview of Generic Tools for Information-Theoretic Secrecy Performance Analysis over Wiretap Fading Channels
Long Kong, Yun Ai, Lei Lei, Georges Kaddoum, Symeon, Chatzinotas, and Bj\"orn Ottersten

TL;DR
This paper provides a comprehensive overview of physical layer security in wiretap fading channels, comparing models, presenting exact secrecy metrics, and proposing a unified analysis framework using advanced distributions.
Contribution
It introduces a unified secrecy analysis framework using mixture gamma, Gaussian, and Fox's H-functions distributions for diverse fading channels.
Findings
Unified secrecy analysis framework established.
Closed-form expressions for secrecy metrics derived.
Enhanced understanding of fading models' impact on security.
Abstract
An alternative or supplementary approach named as physical layer security has been proposed to afford an extra security layer on top of the conventional cryptography technique. In this paper, an overview of secrecy performance investigations over the classic Alice-Bob-Eve wiretap fading channels is conducted. On the basis of the classic wiretap channel model, we have comprehensively listed and thereafter compared the existing works on physical layer secrecy analysis considering the small-scale, large-scale, composite, and cascaded fading channel models. Exact secrecy metrics expressions, including secrecy outage probability (SOP), the probability of non-zero secrecy capacity (PNZ), average secrecy capacity (ASC), and secrecy bounds, including the lower bound of SOP and ergodic secrecy capacity, are presented. In order to encompass the aforementioned four kinds of fading channel models…
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Taxonomy
TopicsWireless Communication Security Techniques · Cooperative Communication and Network Coding · Cryptography and Data Security
