ChannelGuard: A DIRS-Based Location Privacy-Protecting Mechanism for Integrated Sensing and Communication Systems
Peng Zhang, Minghui Min, Mingcheng Liu, Hongliang Zhang, Huan Huang, Ruixin Yang, Shiyin Li, Zhu Han · IEEE Transactions on Vehicular Technology · 2025
Emerging Integrated Sensing and Communication (ISAC) systems integrate wireless communication with highprecision sensing, but the enhanced sensing capabilities also raise serious location privacy concerns. In this paper, we propose ChannelGuard, a novel DISCO intelligent reflective surface (DIRS)-based location privacy protection (LPP) mechanism. ChannelGuard introduces DIRS-based interference and thereby degrades the location estimation accuracy of the untrustworthy ISAC base station (BS). On this basis, we analyze the statistical characteristics of DIRS-based interference noise, revealing an intrinsic link between its noise properties and differential privacy (DP). We then formally prove that ChannelGuard satisfies (ε, δ)- DP and evaluate location privacy by deriving the position error bound (PEB). Numerical results demonstrate that ChannelGuard effectively protects location privacy while inducing a slight tradeoff in communication performance