Authentication and Secure Communication in CSS Cognitive Radio Networks

ABSTRACT Cognitive Radio (CR) technology solves spectrum shortage problem by making utilization of unused spectrum of primary users (PUs). For this purpose, CR or secondary user in network sense the spectrum to know whether primary user (PU) exist in spectrum band or not. Cooperative spectrum sensing (CSS) scheme is more advantageous than individual spectrum sensing (ISS) by CR users. CSS is more accurate and reliable compared to ISS scheme. Some of the secondary users (SUs) may behave maliciously in cooperative spectrum sensing process. These users may send false results of spectrum sensing to fusion center (FC) or may jam the communication channels. Hence, authentication of the users in cognitive radio network (CRN) is necessary. In this paper, propose the protocol which supports authentication for CRNs user based on elliptic curve digital signature algorithm (ECDSA) as it supports for minimum key length. The protocol also establishes the secure communication among CRN nodes. Keywords: CRNs, CSS, PU, SUs, FC, Authentication