A Novel Pilot Spoofing Scheme via Intelligent Reflecting Surface Based on Statistical CSI

Pilot spoofing attack brings new challenges to physical layer secure transmission. However, this method will not work without any knowledge about the pilot sequence and active eavesdropping can be detected by constructing random sequence. Intelligent reflecting surface (IRS), with real-time programmable features for wireless channels, provides possibilities effective spoofing. In paper, IRS is deployed near legitimate users signal always passively reflected. Then control strategy embedded into communication process under time-division duplex mode assist eavesdroppers conduct By setting different phase shifts at during uplink downlink phase, channel reciprocity disappears, thus beamforming vector biased towards eavesdropper. Furthermore, in order overhear more information, average secrecy rate minimization problem based on statistical state information established carefully designing shifts, which non-trivial solve. With alternating optimization Charnes-Cooper transformation technique, original transformed convex form a optimal solution achieved. Finally, simulation results show that our proposed scheme pose serious threat energy footprint. What's more, if utilized internal properly, it bring threat.