Maximizing Privacy in MIMO Cyber-Physical Systems Using the Chapman-Robbins Bound
Systems and Control
2020-09-09 v1 Systems and Control
Abstract
Privacy breaches of cyber-physical systems could expose vulnerabilities to an adversary. Here, privacy leaks of step inputs to linear-time-invariant systems are mitigated through additive Gaussian noise. Fundamental lower bounds on the privacy are derived, which are based on the variance of any estimator that seeks to recreate the input. Fully private inputs are investigated and related to transmission zeros. Thereafter, a method to increase the privacy of optimal step inputs is presented and a privacy-utility trade-off bound is derived. Finally, these results are verified on data from the KTH Live-In Lab Testbed, showing good correspondence with theoretical results.
Keywords
Cite
@article{arxiv.2009.03850,
title = {Maximizing Privacy in MIMO Cyber-Physical Systems Using the Chapman-Robbins Bound},
author = {Rijad Alisic and Marco Molinari and Philip E. Paré and Henrik Sandberg},
journal= {arXiv preprint arXiv:2009.03850},
year = {2020}
}