In-vehicle message authentication key management method and readable storage medium

Abstract

The invention discloses an in-vehicle message authentication key management method. Two-stage keys, namely a master key and a communication key, are configured in all electronic control units which need to receive and send message authentication messages. The master key is used for generating a communication key and protecting the authenticity and integrity of a message in a communication key configuration process; the electronic control units, needing to receive and send message authentication messages, of all vehicles of one vehicle type use the same master key, and the master key is safely written in before the electronic control units are offline and stored in a server database at the same time. The communication key is used for calculating a message authentication code of the message authentication message, and a diagnostic tool is used for configuration before the vehicle is offline; each vehicle is divided into different communication groups according to a network architecture and a functional domain, and each communication group uses a communication key; the electric control unit in each communication group is divided into a master node and a plurality of slave nodes, and the master node is responsible for generating a communication key and completing pairing with the slave nodes. According to the invention, the complexity and cost of key management can be reduced, the identity authentication problem during key generation is solved, and the influence on the starting time is reduced.

Description

technical field [0001] The invention relates to the technical field of bus communication in a car, in particular to the management technology of a bus message authentication key in a car. Background technique [0002] With the rapid development of intelligent networked vehicles, there have been many information security attacks against intelligent networked vehicles at home and abroad. As an important line of defense for the information security of intelligent networked vehicles, vehicle communication security is already facing severe challenges. [0003] In-vehicle communication is limited by its communication method and the hardware architecture of the electronic control unit (ECU). It usually uses clear text transmission without information security measures, and is vulnerable to attacks such as tampering and replay. [0004] In order to ensure the safety of in-vehicle communication, most of the industry currently adopts the deployment of in-vehicle message authenticatio...

AI Technical Summary

Problems solved by technology

[0008] The present invention proposes a method for in-vehicle message authentication key management, the purpose of which is to reduce the co

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