Anomaly detection method for vehicle-mounted CAN bus

Abstract

The invention discloses an anomaly detection method for a vehicle-mounted CAN bus, and belongs to the technical field of information security. The invention provides an anomaly detection method of a vehicle-mounted CAN bus for message data bits of the vehicle-mounted CAN bus. According to the characteristics of the data bits, the data bits of the vehicle-mounted CAN bus message are divided into eight characteristics which respectively represent different instruction meanings and carry important control information, and the method is particularly important for anomaly detection of the data bits. Abnormality detection of CAN message data can be regarded as a dichotomy problem, normal data and abnormal data in machine learning. According to the method of the support vector machine, classification with small errors can be obtained through limited training samples, and the classification accuracy is high. According to the invention, a support vector machine (SVM) method is adopted to realize anomaly detection of the vehicle-mounted CAN bus.

Description

technical field [0001] The invention belongs to the technical field of information security, and more specifically, the invention relates to an abnormal detection method of a vehicle-mounted CAN bus. Background technique [0002] With the development of intelligent and networked vehicles, intelligent networked vehicles have become the development direction of automotive informatization. In recent years, information security incidents against automobiles have occurred frequently, and the information security of connected vehicles has become prominent. It is imminent to study the information security of connected vehicles and vehicle network systems. CAN bus is currently the most widely used vehicle bus network technology. With the emergence of automotive information security issues, malicious attacks directly penetrate into the vehicle CAN bus network through external interfaces, seriously endangering the personal and property safety of drivers and passengers. CAN bus lacks ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is, in order to solve the above-mentioned CAN bus network lacks the problem of information security guarantee in driving, proposes a kind of abnormal detection method of vehicle CAN bus

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