Physical Layer Authentication Enhancement Using Maximum SNR Ratio Based Cooperative AF Relaying

Abstract

Physical layer authentication techniques developed in conventional macrocell wireless networks face challenges when applied in the future fifth-generation (5G) wireless communications, due to the deployment of dense small cells in a hierarchical network architecture. In this paper, we propose a novel physical layer authentication scheme by exploiting the advantages of amplify-and-forward (AF) cooperative relaying, which can increase the coverage and convergence of the heterogeneous networks. The essence of the proposed scheme is to select the best relay among multiple AF relays for cooperation between legitimate transmitter and intended receiver in the presence of a spoofer. To achieve this goal, two best relay selection schemes are developed by maximizing the signal-to-noise ratio (SNR) of the legitimate link to the spoofing link at the destination and relays, respectively. In the sequel, we derive closed-form expressions for the outage probabilities of the effective SNR ratios at the destination. With the help of the best relay, a new test statistic is developed for making an authentication decision, based on normalized channel difference between adjacent end-to-end channel estimates at the destination. The performance of the proposed authentication scheme is compared with that in a direct transmission in terms of outage and spoofing detection.

An Efficient Cross-Layer Authentication Scheme for Secure Communication in Vehicular Ad-Hoc Networks

“…in ( 7) is a one-to-one mapping operation (each 2-bits for each subcarrier) which means that a sufficient number of matched bits in the extracted key from S2 is required to discriminate between Bob and Eve, avoiding false decision making. In other words, a sufficient mutuality, indicated by R in (24), must be assured to successfully authenticate the communicating vehicle. Fig.…”

Physical layer authentication in wireless communication networks: A survey

“…Similar ideas are proposed in Refs. [21,26,27,33,35,39,[55][56][57][58] in different wireless transmission systems. For example, in Refs.…”

“…[54] to time-variant wireless channels, and in Refs. [35,56,58], more complicated communication scenarios such as the cellular Internet of things (CIoT) network, the ad hoc networks, and relay networks are considered to achieve channel-based authentication. The works in Refs.…”