Analysis of Physical Layer Security via Co-operative Communication in Internet of Things

Abstract

Co-operative communication in Internet of Things enable the co-existing heterogeneous wireless networks to co-operate with each other in order to facilitate network traffic, guarantee QoS requirements and to enable energy efficient secure communication even to most demanding users. Physical layer security approaches based on node cooperation promise secure communication even in the presence of an eavesdropper. The three main co-operative schemes that help in improving physical layer (PHY) security via co-operative communication are decode-and-forward (DF), amplify-and-forward (AF) and co-operative jamming (CJ). This work mainly focuses on the performance analysis of PHY layer security via two co-operative schemes (DF and AF) by taking all main fading phenomenon's like path loss, phase fading and shadow fading into consideration. Also a method has been discussed for enhancing the secrecy rate by using two heuristic algorithms: “hill-climbing” and “random-search”.