Vehicle-mounted network safety communication method, device and equipment

Abstract

The invention provides a vehicle-mounted network safety communication method, device and equipment, and aims to ensure that fresh values are effectively synchronized in the whole vehicle life cycle of a vehicle in vehicle-mounted network communication and prevent replay attacks. The equipment comprises: a first processing module used for obtaining an initial value of a first fresh value FV, obtaining a second value according to the initial value, and refreshing the initial value into the second value; the first sending module that is used for executing first message sending, and the first message comprises the second value of the first FV; the first receiving module that is used for receiving a first message; and the second processing module that is used for obtaining the initial value of the second fresh value FV and refreshing the second FV to a second value when the first condition is met, and the second condition comprises that the second value of the first FV is greater than or equal to the sum of the initial value of the second FV and the preset value.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a vehicle network security communication method, device and equipment. Background technique [0002] In recent years, automobile technology has developed rapidly in the direction of intelligence, electrification, networking, and sharing. The number, connection, and interaction of electronic equipment inside the vehicle have also continued to increase, gradually forming a CAN (ControllerArea Network ), local interconnection network LIN (Local Interconnection Network), FlexRay, multimedia transmission system MOST (Media Oriented Systems Transport), vehicle-mounted Ethernet and other representative vehicle communication networks. In the existing in-vehicle network, most of the data transmission is basically performed without security measures or with low security measures, and is vulnerable to malicious attacks by hackers. [0003] Due to the advantages of CAN p...

AI Technical Summary

Problems solved by technology

The time stamp scheme relies on synchronizing UTC (Coordinated Universal Time) world standard time among all ECUs, but problems such as clock jitter and time stamp synchronization anomalies will cause the receiver to fail to receive CAN messages, resulting in system functional safety issues

For the monotonic counter scheme, the implementation of the fresh value synchronization mechanism is too complicated, and there are many unforeseen unstable factors in the fresh value synchronization process, which cannot guarantee timely periodic synchronization, resulting in the enlargement of the window for replay attacks

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