In-vehicle network safety communication sending and receiving method and device

A technology of secure communication and sending method, applied in the field of in-vehicle network communication, can solve problems such as information security issues that have not been considered, and achieve the effect of preventing brute force cracking and the threat of replay attacks

Active Publication Date: 2020-12-25
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the most widely used CAN communication design did not consider information security issues at the beginning

Method used

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  • In-vehicle network safety communication sending and receiving method and device
  • In-vehicle network safety communication sending and receiving method and device
  • In-vehicle network safety communication sending and receiving method and device

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0043] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the drawings, and the related Other details are not relevant to the invention.

[0044] It should be emphasized that the term "comprising / comprising" when used herein refers to the presence of a feature, element, step or component, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0045] The In...

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Abstract

The invention provides an in-vehicle network safety communication sending and receiving method and device. The method comprises the steps that a sending end generates a message authentication code according to original message data and a fresh value, and carries out the cutting of the message authentication code to obtain a message authentication code cutting value; and the message authenticationcode cutting value is embedded into the original message data based on the embedding position generated by the CAN ID and the fresh value, and the message authentication code cutting value is splicedwith the fresh value cutting value to obtain a to-be-sent message packet. The receiving end extracts a fresh value cutting value from the message packet, supplements the fresh value cutting value according to a first fresh value of a previous message recorded by the receiving end and a second fresh value of a counter of the receiving end to obtain a complete fresh value, calculates an embedded position according to the fresh value and the CAN ID, and extracts a first message authentication code cutting value and original message data; and a message authentication code is calculated according to the original message data and the fresh value, and cut to obtain a second cutting value for comparing and verifying the legality of the message. The method can effectively prevent the cutting valueof the message authentication code from being violently cracked, and prevent the threat of a replay attack.

Description

technical field [0001] The invention relates to the technical field of in-vehicle network communication, in particular to a method and device for sending and receiving secure communication in an in-vehicle network. Background technique [0002] With the development of technology, cars as a means of transportation are gradually becoming more intelligent to meet more usage needs. In order to achieve more functions such as automatic driving, automatic parking, lane departure warning, etc., the vehicle establishes an intra-vehicle network to connect and communicate with each processing device and sensor device of the vehicle, and coordinate the work of each device to achieve specific functions. [0003] The development of automotive electronics and the increase in the complexity of vehicle functions have increased the number of on-board controllers from a few before to hundreds of complex ones. Based on functional requirements, each controller needs to interact with a large amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/32H04L29/06H04L1/00H04L12/40H04L29/08
CPCH04L9/0861H04L9/3242H04L63/12H04L63/1441H04L1/0007H04L12/40H04L67/12H04L2012/40215H04L2012/40273
Inventor 杨正球修佳鹏田超宇
Owner BEIJING UNIV OF POSTS & TELECOMM
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