Intelligent reflective surface (IRS) technology is emerging as a promising performance enhancement technique for next-generation wireless networks. Hence, we investigate the physical layer security of downlink in IRS-aided non-orthogonal multiple access networks presence an eavesdropper, where IRS deployed enhancing quality by assisting cell-edge user to communicate with base station. To charac...

Lower/physical layer characteristics have been considered as potential alternatives/complements to provide security services in wireless networks. This article provides an overview about various non-cryptographic mechanisms for user authentication and device identification in wireless networks using lower/physical layer properties or information. We discuss merits and demerits of these authenti...

Wireless Networks rendering varied services has not only become the order of the day but the demand of a large pool of customers as well. Thus, security of wireless networks has become a very essential design criterion. This paper describes our research work focused towards creating secure cognitive wireless local area networks using soft computing approaches. The present dense Wireless Local A...

The broadcast nature of radio propagation makes wireless networks vulnerable to eavesdropping attacks. To enhance authentication strength in wireless networks, various physical layer authentication schemes were proposed by exploiting physical layer characteristics. Recently, we proposed a novel PHYsical layer Phase Challenge-Response Authentication Scheme (PHY-PCRAS), which exploits both the re...

This paper examines threats to the security of the Mobile WiMax/ 802.16e broadband wireless access technology. Threats associated with the physical layer and MAC layer are reviewed in detail. Threats are listed and ranked according to the level of risk they represent. This review work can be used to prioritize future research directions in Mobile WiMax/802.16e security.

In this paper we provide secrecy metrics applicable to physical-layer coding techniques with finite blocklengths over Gaussian and fading wiretap channel models. Our metrics go beyond some of the known practical secrecy measures, such as bit error rate and security gap, so as to make lower bound probabilistic guarantees on error rates over short blocklengths both preceding and following a secre...