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Communication method and device based on in-vehicle network

A communication method and technology of in-vehicle network, applied in the field of communication method and device based on in-vehicle network, can solve the problem that attackers cannot be prevented from eavesdropping on CAN messages

Pending Publication Date: 2021-07-16
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the SecOC mechanism of AUTOSAR cannot prevent attackers from eavesdropping on CAN messages

Method used

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  • Communication method and device based on in-vehicle network
  • Communication method and device based on in-vehicle network
  • Communication method and device based on in-vehicle network

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0044] Embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0045] figure 1 It is a schematic structural diagram of an applicable communication system of the present application. The communication system takes an electronic and electrical (E / E) system as an example. The communication system may include a gateway, a domain controller, an electronic control unit (electronic control unit, ECU) and at least one CAN bus. The communication system can be divided into a plurality of different domains according to functions, and each domain can include at least one domain controller, and each domain controller is used to manage a plurality of ECUs connected to one or more CAN buses in the domain. like figure 1 As shown, domain controller 1 is used to manage multiple ECUs connected to the CAN bus of the vehicle control system in the domain, domain controller 2 is used to manage multiple ECUs connected to the CAN bus...

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PUM

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Abstract

The invention discloses a communication method and device based on an in-vehicle network, which are used for solving the problem that an ECU is easy to eavesdrop when transmitting a message in the prior art. In the application, the method comprises the steps that enabling a first ECU to operate a first key and a first fresh value to generate a key stream; performing XOR operation on the key stream and a to-be-transmitted first plaintext message to generate a first ciphertext message; and sending the first ciphertext message to the second ECU, wherein the first fresh value is a value generated by a counter used for recording the message transmission times of the first ECU in the first ECU when the first ECU transmits the message. The first ECU transmits the first ciphertext message to the second ECU, so that the first message transmitted by the first ECU can be prevented from being eavesdropped, and the confidentiality of transmitting the message by the first ECU can be improved.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a communication method and device based on an in-vehicle network. Background technique [0002] With the development of technology, various businesses in the automotive industry are also becoming more and more mature. In the system of the car, there are many electronic control units (ECU), and the ECU is a special microcomputer controller for the car. The network connecting these ECUs is called a controller area network (CAN). The bus protocol of CAN is a serial communication bus based on the message broadcast mode. It was originally used to realize reliable communication between ECUs in automobiles. Later, because of its simplicity, practicality and reliability, it is widely used in industrial automation, ships, medical and other fields. [0003] At present, during the communication process based on the CAN bus protocol, malicious attackers can eavesdrop, ...

Claims

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Application Information

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IPC IPC(8): H04L9/06H04L9/08H04L29/06
CPCH04L9/0643H04L9/0861H04L9/0863H04L63/0428H04L63/123H04L63/12H04L67/12H04L9/0637H04L9/3242H04L2209/84H04L9/065H04L9/14
Inventor 王勇
Owner HUAWEI TECH CO LTD