关键词: 激励响应认证,OFDM技术,接收操作特性曲线,理论分析

Abstract: The physical layer authentication recognizes the identities of communication users by exploiting the characteristics of physical layer resources,which can effectively prevent illegal users from accessing the wireless network in order to enhance the information security of wireless network.PHY-CRAM proposed recently is a typical physical layer challenge response authentication mechanism,and its performance mainly depends on the simulation.So this paper attempted to theoretically analyze the authentication performance and derived the analytical expressions of successful authentication rate and false acceptance rate.The derived results show that the correlation coefficient of PHY-CRAM authentication standards obeys Rice distribution,and successful authentication rate and false acceptance rate can be calculated by Marcum Q function.The computer simulation results show that the probability density curve of correlation coefficient is coincident with that of Rice distribution,and the longer the secret key is,the better the fitness is.The theory value of receiver operating characteristic curve is identical with the statistical value.

Key words: Challenge response authentication,OFDM technology,Receiver operating characteristic curve,Theoretical analysis