This paper addresses the problem of output consensus in linear passive multi-agent systems under a False Data Injection (FDI) attack, considering the unavailability of complete state information. Our formulation relies on an event-based cryptographic authentication scheme for sensor integrity and considers FDI attacks at the actuator end, inspired by their practical nature and usages. For secure consensus, we propose (i) a passivity-based approach for detecting FDI attacks on the system and (ii) a Zeno-free event-triggered observer-based switching controller, which switches between the normal and the defense modes following an attack detection. We show that the closed-loop system achieves practical consensus under the controller's action in the defense mode. Simulation examples are provided to support the theoretical findings.
@article{arxiv.2403.15697,
title = {Passivity-based Attack Identification and Mitigation with Event-triggered Observer Feedback and Switching Controller},
author = {Pushkal Purohit and Anoop Jain},
journal= {arXiv preprint arXiv:2403.15697},
year = {2024}
}