Security-aware dual-hop communication for amplify-and-forward relay networks

Fei Ding,Dengyin Zhang,Xiaojin Ding,Hongbo Zhu,Xiaojun Sun,Ruoyu Su

doi:10.1177/1550147719878079

Abstract

The authentication scheme for vehicular ad hoc networks aims to improve the security and integrity of message delivery. The base station manages a large number of vehicular nodes, so the security communications are non-trivial. In this article, we propose an amplify-and-forward strategy for a dual-hop cooperative network in order to improve secure communications for vehicular ad hoc networks. We assume that each vehicular node equipped with a single antenna and derive closed-form expressions for the secure communication rate calculation. Moreover, we propose a cooperative strategy by jointly considering average power scaling and instantaneous power scaling, which are proved to be able to achieve information security. The simulation result shows that the proposed scheme can achieve better performance in scenarios with different signal-to-noise ratio.

Highlights

Due to the nature of the broadcasting communication, wireless communications are susceptible to eavesdropping
In this article, inspired by the previous work in the AF dual-hop relay for secure communications within Wyner’s wire-tap channel, such as Hasna and Alouini[22] and Suraweera et al.,[23] we investigate the secure communications in vehicular ad hoc networks (VANETs) in terms of the bit error rate and the outage probability
We show the approximate average secure communication rates when Eve can observe the output from R and S by assuming the sufficiently high signal to noise ratio (SNR) of the S-R links in this subsection

Summary

Introduction

Due to the nature of the broadcasting communication, wireless communications are susceptible to eavesdropping. Keywords Information security, relay, wiretap channel, amplify-and-forward, dual-hop, secrecy rate The closed-form expression of the secrecy rate is derived for IPS when source-relay channels experience Rayleigh fading without a sourceto-eavesdropper (S-E) link. The approximate expressions of average secrecy rate are derived both for APS and IPS.

Results

Conclusion