Research Article
Detection Against Replay Attack: A Feedback Watermark Approach
@INPROCEEDINGS{10.1007/978-3-031-06371-8_45, author={Xudong Zhao and Le Liu and H. R. Karimi and Wei Xing}, title={Detection Against Replay Attack: A Feedback Watermark Approach}, proceedings={Science and Technologies for Smart Cities. 7th EAI International Conference, SmartCity360°, Virtual Event, December 2-4, 2021, Proceedings}, proceedings_a={SMARTCITY}, year={2022}, month={6}, keywords={Cyber physical system Physical watermark Replay attack}, doi={10.1007/978-3-031-06371-8_45} }- Xudong Zhao
Le Liu
H. R. Karimi
Wei Xing
Year: 2022
Detection Against Replay Attack: A Feedback Watermark Approach
SMARTCITY
Springer
DOI: 10.1007/978-3-031-06371-8_45
Abstract
Since malicious cyber attacks are common in modern industry, cyber security has become an important issue. Motivated by this, a novel feedback watermark approach is proposed to defend cyber physical systems against replay attacks in this paper. Specifically, we propose a new secure control framework to defend systems against replay attacks, where a feedback channel and a feedback control function are constructed. We address the problem starting from the problem formulation with a linear quadratic Gaussian (LQG) controller, a Kalman filter and a(\chi ^2)detector. We investigate the LQG performance with replay attacks and study the LQG performance loss after adding feedback watermarks. It is also proved that the detector output will converge to a new steady point with a class of feedback function when an attacker launches replay attacks. It is shown that our approach can increase the probability of detecting replay attacks. Finally, we show the validity of feedback watermarks with a numerical example.
