Fundamental Limits of Passive Attacks on Wireless Link Signatures
The goal of this paper is to gain a fundamental understanding of the potential vulnerability of existing wireless link schemes subject to passive eavesdropping and inference. From the adversary's perspective, the feasibility and fundamental limit of this new attack is explored. In addition, how the theoretical results are instantiated in various channel models and how the different adversary sensor deployments affect the inference accuracy are also studied for practical interests. Preliminary theoretical study reveals that a high-fidelity estimate of the desired signal is indeed feasible, provided the spatial correlation among the legitimate receiver and sensors satisfies certain conditions.