Physical intrusion equipment positioning method and system based on pulse reflected wave detection

Abstract

The invention discloses a physical intrusion equipment positioning method and system based on pulse reflected wave detection, and the method comprises the steps: repeatedly transmitting a short-time pulse signal in a serial communication bus network, receiving a signal in the bus network, and extracting the time domain feature of a reflected signal from the received signal through employing a weak signal noise reduction technology; detecting whether an intrusion signal exists or not according to feature matching to judge whether physical intrusion equipment exists in a communication bus network, and finally estimating the distance length from each physical intrusion equipment to a detection source by using the time domain feature and the transmission speed of an intrusion reflection signal so as to realize the positioning of the physical intrusion equipment in different distributions. According to the method, whether the physical intrusion equipment exists in the system or not can be quickly and accurately judged, meanwhile, the spatial position of each physical intrusion equipment can be accurately recognized, and the problem that an existing fault checking technology utilizing reflected signals cannot be effectively applied to a serial communication bus network and cannot achieve physical intrusion equipment positioning is solved.

Description

technical field [0001] The invention belongs to the technical field of attack detection of industrial control systems, and in particular relates to a method and system for locating physical intrusion equipment based on pulse reflected wave detection. Background technique [0002] In recent years, the Industrial Internet of Things, based on cyber-physical systems and aimed at equipment interconnection, intelligent production, and remote coordination and autonomy, has become the main trend in the development and innovation of industrial control systems. The integration of information network and physical physical system has strengthened the important role of information network data in industrial control systems. Using information network data can more comprehensively perceive the process status of equipment work and industrial chain production. At the same time, based on information network Data analysis can also build a system-level security defense system more efficiently. ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and system for locating physical intrusion devices based on pulse reflected wave detection for preventing access by physical intrusion devices in a serial communication bus network. The threat of attacks brought by it can be quickly and efficiently located in the location distribution of physical intrusion devices, which solves the problem that the existing troubleshooting technology using reflected signals cannot be effectively applied to serial communication bus networks and realize the location of physical intrusion devices problem

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