Method for preventing in-car terminal from being detached

A vehicle-mounted terminal and tamper-proof technology, applied in the direction of digital transmission system, data exchange network, electrical components, etc., can solve the problem of ECU not knowing.

Inactive Publication Date: 2016-01-13
XIAMEN YAXON NETWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional heartbeat messages are generally fixed-format messages or generated by a certain algorithm; once the content of the heartbeat message is leaked or cracked, a third-party device can be used to simulate the bus heartbeat to the ECU. Even if the terminal is removed, the ECU has no way of knowing

Method used

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  • Method for preventing in-car terminal from being detached
  • Method for preventing in-car terminal from being detached

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Embodiment Construction

[0013] The present invention will be further described in conjunction with the above figures and specific embodiments.

[0014] As a specific example, refer to figure 1 with figure 2 As shown, the present invention is a method for anti-dismantlement of a vehicle-mounted terminal. The vehicle-mounted terminal and the ECU do not use fixed format messages, nor use fixed messages + algorithms to generate heartbeat interaction; instead, a dynamic password is used for heartbeat interact. The heartbeat interaction is initiated by the vehicle ECU. In the existing one, the terminal sends a heartbeat to the ECU, and the ECU judges whether the terminal is disassembled through the heartbeat. The dynamic password is calculated by encrypting the fixed password + dynamic password with MD5. The definitions of the three terms are as follows:

[0015] 1. fixed password : This fixed password is jointly owned by the ECU and the vehicle-mounted terminal; the fixed password is a string, such...

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PUM

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Abstract

The invention relates to an anti-detachment technology field, in particular to a method for preventing an in-car terminal from being detached. The method includes: 1) stipulating a fixed password between the in-car terminal and a vehicle ECU; 2) generating a random password R by the vehicle ECU, joining the fixed password of the vehicle ECU with the random password R, generating an MD5 encrypted value which is a dynamic password A, sending a heartbeat interactive request to the in-car terminal by the vehicle ECU through a CAN bus, wherein a frame of the heartbeat interactive request contains the random password R; 3) after a CAN transceiver of the in-car terminal receives the heartbeat interactive request of the vehicle ECU, extracting the random password R, joining the fixed password of the in-car terminal with the random password R by the in-car terminal, generating an MD5 encrypted value which is a dynamic password B, and sending the dynamic password B to the vehicle ECU through the CAN transceiver, wherein the dynamic password B is used as a heartbeat frame; 4) after the vehicle ECU receives the heartbeat frame, comparing the dynamic password A with the dynamic password B, and if the dynamic password A coincides with the dynamic password B, determining that the in-car terminal is normal, otherwise determining that the in-car terminal is detached. The method has a characteristic of high safety.

Description

technical field [0001] The invention relates to the technical field of anti-dismantlement, in particular to a method for anti-dismantlement of a vehicle-mounted terminal. Background technique [0002] At present, many construction machinery vehicles realize the monitoring and control of sales and loan vehicles (purchased by loan) by installing vehicle-mounted terminals. In order to prevent the vehicle-mounted terminals from being maliciously disassembled, the vehicle ECU has designed and developed an anti-dismantle function. The vehicle ECU device conducts regular heartbeat interaction with the vehicle terminal through the bus, and judges whether the positioning terminal is disassembled based on whether the heartbeat interaction is normal. Once the ECU detects an abnormal heartbeat, it will automatically limit the speed of the vehicle and lock the vehicle. Traditional heartbeat messages are generally fixed-format messages or generated by a certain algorithm; once the content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L9/32
CPCH04L9/3226H04L43/10
Inventor 朱进阳陈挺姚亮林水淼赖荣东
Owner XIAMEN YAXON NETWORKS CO LTD
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