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Vehicle data transmission method and system

A technology of vehicle data and transmission method, which is applied in the field of data processing and can solve the problem that the security of keys cannot be guaranteed.

Active Publication Date: 2019-11-26
三六零数字安全科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the developers of related ECUs, there are many ways to know the key and data processing protocol. This form cannot guarantee the security of the key, and even leads to the reverse engineering of CAN messages by third-party attackers and ECU suppliers. The problem of using CAN message to control the car ECU

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  • Vehicle data transmission method and system
  • Vehicle data transmission method and system
  • Vehicle data transmission method and system

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Embodiment Construction

[0089] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0090] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more o...

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Abstract

The invention discloses a vehicle data transmission method and system. The method comprises the steps of establishing an authentication relationship between a first electronic control unit ECU and a corresponding smart card; when the first ECU transmits a CAN message to a second ECU, sending the CAN message sent by the first ECU to the smart card for encryption, and sending the encrypted CAN message to a bus; and when the encrypted CAN message transmitted on the bus is received, sending the received encrypted CAN message, by the first ECU, to the smart card for decryption and taking data returned by the smart card as valid data. According to the method and the system, in a mode of employing the smart card, the CAN message information of a whole vehicle is encrypted with relatively low cost, the CAN message can be encrypted and decrypted rapidly, the transmission timeliness demand of the data is ensured, the possibility of taking the CAN message information as an attack by an ECU subcontractor is reduced to the greatest extent, and a CAN message protocol is effectively prevented from being utilized by a third party to attack a car.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a vehicle data transmission method and system. Background technique [0002] Automotive ECU (Electronic Control Unit, electronic control unit), also known as "driving computer", "vehicle computer", etc., is a microcontroller dedicated to automobiles. [0003] At present, car manufacturers formulate car actions and corresponding CAN message signals, and distribute CAN message signals corresponding to specific ECUs to ECU subcontractors for function realization. However, for car manufacturers, ECU subcontractors are not completely trustworthy, and in the existing transmission link, CAN message signals exist in the form of plain text, so its confidentiality is difficult to guarantee. [0004] In response to the above problems, some car manufacturers currently install keys in the ECU to encrypt messages. However, for the developers of related ECUs, there are many ways to kn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/08
CPCH04L63/0428H04L63/08H04L63/083H04L63/0853H04L63/0869H04L67/12
Inventor 曹明革刘健皓
Owner 三六零数字安全科技集团有限公司
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