Application Of Spoofing Relay Based Proactive Eavesdropping Technology In Wireless Communication Systems

Due to the development of wireless communication technology,the communication security problem has attracted more and more attention.Nevertheless,the study on the effective wireless monitoring technology applied in addressing malicious communications is insufficient.In the paper,based on the theory of millimeter wave and unmanned aided communication systems,the wireless monitoring problems under there different scenarios are researched.Firstly,this paper proposes a spoofing relay based proactive eavesdropping scheme in millimeter wave single input multiple output(SIMO)system.In the scheme,the legal monitor conducts surveillance by being disguised as a relay,in which the legal monitor operates in full duplex mode which implies it monitors illegal link information and adaptively transmits spoofing signals to the suspicious receiver according to the quality of the channel state in order to decode the messages by inducing the suspicious transmitter to change the communication rate.With the goal of maximizing eavesdropping rate,the paper presents a bi-circulating alternative algorithm to resolve the complex initial optimization problem by utilizing Dinkelbatch and BCD-type algorithm.The simulation results elaborate the effectiveness and superiority of the proposed algorithm.Secondly,the paper introduces millimeter wave into multiple input multiple output(MIMO)system and correspondingly studies the monitor problem,which is closer to the actual compared to the first case.In this sophisticated system,the paper proposed an active eavesdropping scheme for maximizing eavesdropping rate.In order to address the mathematical problem of unmanageable fraction and four couple matrix variables,we resort to PDD algorithm and put forward a bi-calculating alternative algorithm.The comparison simulation exhibits the superiority of proposed scheme.Finally,we study the monitor problem in unmanned aided vehicle(UAV)communication system,based on the concept of spoofing relay based proactive eavesdropping.In target system,the UAV plays the role of legal monitor.For maximizing effective eavesdropping rate,we optimize the location and power distribution of UAV.The paper divides the initial problem into two subcases and ultimately finds the optimal UAV location and flying range.The simulation results verify the effectiveness of the proposed scheme.