Unlock instant, AI-driven research and patent intelligence for your innovation.

CAN bus message signature method, device and system suitable for intelligent networked automobile

A technology of CAN bus and smart network, which is applied in the field of network communication, can solve problems such as inability to guarantee safety, achieve the effect of ensuring safety and realizing safe communication

Active Publication Date: 2019-10-25
NORTH CHINA UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, existing intelligent connected vehicles cannot guarantee safety

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • CAN bus message signature method, device and system suitable for intelligent networked automobile
  • CAN bus message signature method, device and system suitable for intelligent networked automobile
  • CAN bus message signature method, device and system suitable for intelligent networked automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below through specific embodiments and accompanying drawings.

[0041] In this embodiment, the CAN bus message signature method applicable to smart connected cars, the overall process is as follows figure 1 shown, including the following steps:

[0042] 1. The sender makes a sending request;

[0043] 2. The sender signs the message:

[0044] (1) Generate the original signature of the message. The valid information in the signature needs to come from the original standard frame ID, message counter and transmission data.

[0045] (2) The original signature of the message is compressed. Since the size of the CAN bus message is severely limited and the number of bytes sent at a time is small, in order to compress the 256-bit digital signature generated by the SHA256 function, we propose a new streamlining tec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a CAN bus message signature method, device and system suitable for an intelligent networked automobile. The signature method comprises the steps of generating an original signature of a CAN bus message according to a CAN standard frame ID of the CAN bus message, a message counter and data in a CAN standard frame; compressing the generated original signature; and filling the CAN extension frame with data in the CAN standard frame and the compressed signature, and transmitting all contents of the CAN standard frame by using the CAN extension frame carrying signature information; and when the message signature is verified, the receiving end receiving the message containing the CAN extension frame sent by the sending end, and verifying the validity of the message by using the message signature. On the basis of being compatible with an existing CAN bus protocol, the information verification problem of the CAN bus is solved, safe communication between CAN nodes is achieved, and then the safety of the intelligent networked automobile is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of network communication, and in particular relates to a lightweight CAN bus message signing method, device and system suitable for intelligent networked vehicles. Background technique [0002] The intelligence of the car promotes more frequent interconnection between the internal components of the car and the external network. The intelligent network connection system used in it follows the existing network architecture, so it also inherits the natural security defects of these systems. However, an important factor leading to these security problems is the lack of a message signature mechanism in the vehicle's internal Control Area Network (CAN). The CAN bus protocol is the most widely used and most important communication protocol in modern vehicles. Its communication mechanism is simple, broadcast transmission, no authentication and encryption mechanism, which makes it vulnerable to new open scenarios. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/06H04L9/32H04L12/40H04L29/06
CPCH04L9/0643H04L9/3247H04L12/40H04L69/06H04L69/04H04L2012/40215
Inventor 王超董山菊徐刚何云华
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY