Detection method for replay attacks using active packet loss in networked control systems
HU Jiankun
YIN Xunhe
CHEN Lihong
Abstract：To detect replay attacks in Networked Control Systems (NCS),inspired by existing researchutilizing physical watermarking,this paper proposes a real-time detection method employing active packet loss. Firstly,at the theoretical level,a detection function is constructed,using system output residuals and demonstrating the effectiveness of the method by observing changes in the detection func-tion pre and post attack. Then,using a four-wheel vehicle as the controlled object,the changes in ve-hicle speed and detection function pre and post attack are compared. Finally,considering both the de-tection results of replay attacks and the vehicle's speed tracking,the optimal range of active packet loss rates for the vehicle is determined. Results indicate that prior to active packet loss implementa-tion,vehicle speed undergoes significant changes while the detection function remains relatively stable under replay attacks. Conversely,with active packet loss,both vehicle speed and detection function exhibit dramatic changes during replay attacks. Within an active packet loss rate of 12％ to 16％,the system accurately detects replay attacks while ensuring smooth vehicle operation,providing valuable insights for future replay attack detection research.
Keywords：networked control systemsreplay attacksactive packet losschi-square detection
Publication Date：2024-04-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 134-143 )