Safe communication method of internal automobile network in Telematics

Abstract

The invention discloses a safe communication method of an internal automobile network in the Telematics and mainly solves a problem of unsafe internal networks in the prior art. The method is characterized by comprising steps that, 1, a group of group keys is sent by a key electronic control unit to an electronic control unit to form an encrypted internal vehicle network; 2, the group keys are acquired by a gateway after being verified by the internal vehicle network and are complemented to the internal vehicle network; 3, a pair of keys used for encrypting communication information between external nodes and the gateway is generated by the key electronic control unit in the internal vehicle network to guarantee communication safety; and 4, during next-time communication, periodic update and change update for the group keys are carried out by the key electronic control unit based on demands. Through the method, communication confidentiality and integrity of the internal vehicle network are realized at minimum cost, playback attack is further prevented, each data of the internal vehicle internet can be prevented from being spied when a vehicle communicates with an external node or an external network, and real-time situations in the vehicle can be further protected.

Description

technical field [0001] The invention belongs to the technical field of wireless networks, relates to a safe communication method for a vehicle intranet, and can be used for transmitting real-time road condition information of vehicles running. Background technique [0002] In-vehicle network realizes intelligent transportation, in-car entertainment and car intelligence by providing Internet connection, mobile device connection, remote debugging, firmware over-the-air update, and automatic anti-collision functions. The remote controller hopes to be able to understand various real-time parameters during the driving process of the car in real time, and to perform remote control. [0003] The traditional in-vehicle network usually consists of more than 70 electronic control units ECU and the controller area network CAN bus connecting these control units. However, security issues were not considered when the CAN bus was designed. For example, when the controller area network CAN...

AI Technical Summary

Problems solved by technology

However, these schemes do not achieve the purpose of real-time control

There are certain problems in the framework of some schemes: First, in order to realize the direct connection between the external node and the intranet, the external node must be able to know the data frame format of various vehicles and the meaning represented by the data frame. In reality, each car production For the sake of their respective business secrets, the meaning represented by the CAN bus data frame of the controller area network is not disclosed and is different

Secondly, directly connected to the in-vehicle network may bring more security problems

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