Research survey on defense strategy of attack threat in cyber physical systems

Cyber-physical systems are intelligent system that connect physical objects and computational units through cyberspace, forming an integrated framework of perception-transmission-decision-control. As cyber-physical systems are applied to many critical infrastructures, their security issues have attracted researchers’ interest. Firstly, typical modeling methods for cyber-physical systems are presented to meet the needs of performance analysis. Then, three representative network attack models (denial of service attack, spoofing attack and replay attack) are constructed from a mathematical representation perspective, laying the foundation for the study of defense methods. Next, both specific and general defense methods are summarized for cyber-physical systems, and the latest research progress is reviewed. Finally, existing problems are identified from four different perspectives, and future research directions are discussed. © 2024 South China University of Technology. All rights reserved.