Instead of against eavesdropping, this letter proposes a new paradigm in wireless security by studying how a legitimate monitor (e.g., government agencies) efficiently eavesdrops a suspicious wireless communication link. The suspicious transmitter controls its communication rate over Rayleigh fading channels to maintain a target outage probability at the receiver, and the legitimate monitor can successfully eavesdrop only when its achievable rate is no smaller than the suspicious communication rate. We propose a proactive eavesdropping via jamming approach to maximize the average eavesdropping rate, where the legitimate monitor sends jamming signals with optimized power control to moderate the suspicious communication rate.
@article{arxiv.1510.05140,
title = {Proactive Eavesdropping via Jamming for Rate Maximization over Rayleigh Fading Channels},
author = {Jie Xu and Lingjie Duan and Rui Zhang},
journal= {arXiv preprint arXiv:1510.05140},
year = {2015}
}