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CAN message abnormality detection method and system

An anomaly detection and message technology, which is applied in the field of CAN message anomaly detection method and system, can solve the problem of high cost, and achieve the effect of high security, simple and efficient method of CAN message anomaly detection, and strong practicability

Active Publication Date: 2015-01-21
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the implementation of these CAN bus anomaly detection solutions requires re-changing the software and hardware design of the automotive gateway, which is costly

Method used

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  • CAN message abnormality detection method and system
  • CAN message abnormality detection method and system
  • CAN message abnormality detection method and system

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] The method and system for abnormality detection of CAN messages of the present invention will be described in detail below in conjunction with the diagrams.

[0027] refer to figure 1 , the anomaly detection method of the CAN message of the embodiment of the present invention, comprises the following steps: establish the connection with the gateway of the CAN bus of vehicle and CAN subnet, receive CAN frame from gateway and CAN subnet, CAN frame comprises identifier and data Domain; judge whether the frame format of the C...

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Abstract

The invention provides a CAN message abnormality detection method. The method includes the following steps that connection with a gateway of a CAN bus and CAN subnets of a vehicle is built, and CAN frames are received from the gateway of the CAN bus and the CAN subnet; whether the frame format of the CAN frames is correct or not is judged, and if the frame format of the CAN frames is wrong, the CAN frames are dropped and an alarm is given out; if the frame format of the CAN frames is correct, the detection function is further called to conduct legitimacy detection on the CAN frames; if the CAN frames are illegal, the CAN frames are determined to be abnormal, and the CAN frames are dropped or / and the alarm is given out. If CAN frames are legal, the CAN frames are sent to the gateway or the CAN subnet. The CAN message abnormality detection method is simple and efficient and high in safety and practicability. The invention further provides a CAN message abnormality detection system.

Description

technical field [0001] The invention relates to the technical field of CAN bus communication security, in particular to a method and system for abnormal detection of CAN messages. Background technique [0002] The electronic system of the automobile includes a plurality of electronic control units (electronic control unit, ECU), and the ECUs communicate through a controller area network (CAN) bus and according to the CAN communication protocol. The CAN communication protocol stipulates that the cyclic redundancy check code (cyclic redundancy check, CRC) segment of the data frame is used to enhance the reliability of the communication, but it does not provide the encryption and authentication process of the data frame, which cannot enhance the security of the communication. If the attacker controls the vehicle gateway or the ECU in a CAN subnet, it may send attack information to any other CAN subnet, affecting the normal communication and operation of the ECU in the entire CA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/40
Inventor 王剑张子键袁坚
Owner TSINGHUA UNIV