CN211606521U

CN211606521U - Encryption type vehicle-mounted terminal based on security chip

Info

Publication number: CN211606521U
Application number: CN202020416204.4U
Authority: CN
Inventors: 胡浩瀚; 单宝麟; 王传宝; 李宽荣; 武乃超; 高勇
Original assignee: Tianjin Richsoft Electric Power Information Technology Co ltd; State Grid Information and Telecommunication Co Ltd
Current assignee: Tianjin Richsoft Electric Power Information Technology Co ltd; State Grid Information and Telecommunication Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-09-29
Anticipated expiration: 2030-03-27

Abstract

An encryption type vehicle-mounted terminal based on a security chip comprises a power supply module, an ACC monitoring circuit, an MCU, a storage module, the security chip, a mobile communication module and a positioning module, wherein the ACC monitoring circuit and the positioning module are both connected with the MCU through one-way signals, the ACC monitoring circuit transmits an ACC signal of a vehicle to the MCU, and the positioning module transmits a position signal of the vehicle to the MCU; the storage module, the security chip and the mobile communication module are all in bidirectional signal connection with the MCU; the power module provides complete machine power supply for the vehicle-mounted terminal. The vehicle-mounted terminal carries out encryption transmission on the position and shape data of the vehicle on the basis of the current vehicle-mounted terminal data protocol standard and data transmission, and has good safety and can not be intercepted and cracked by illegal personnel; a safety chip hardware circuit is added on the basis of the existing vehicle-mounted terminal, so that the design is simple; the encryption of the hardware security chip is higher than the encryption confidentiality of software, and the vehicle information cannot be revealed due to factors such as the fact that the software is cracked or a backdoor exists in the software.

Description

Encryption type vehicle-mounted terminal based on security chip

Technical Field

The utility model relates to an information communication technology field, concretely relates to encryption type vehicle mounted terminal based on safety chip.

Background

The vehicle-mounted terminal can monitor the position, safety, operation and technical state of the vehicle in all weather, can provide multiple services such as real-time positioning, fleet management, vehicle theft prevention, help seeking, fault maintenance, information inquiry and the like, is widely applied to position monitoring of logistics, public transportation, enterprise and public institutions and private car users, most social vehicles do not have too high data safety requirements, but for industrial departments such as public security, armed police, bank escort and the like, the position of the vehicle in running needs to be monitored and the data safety needs to be ensured, and most vehicles transmit vehicle running track information by using a mobile wireless data channel of a telecom operator.

However, the current vehicle-mounted terminal cannot encrypt the vehicle position and state information, and an illegal person can intercept wireless data information from the air to cause data leakage.

ACC: adaptive Cruise Control, Adaptive Cruise Control;

MCU: microcontroller Unit, a micro control Unit;

SPI interface: serial Peripheral Interface;

through published patent search, no relevant comparison documents are found.

Disclosure of Invention

An object of the utility model is to overcome prior art's weak point, provide an encryption type vehicle mounted terminal based on safety chip, this vehicle mounted terminal branch of academic or vocational study is on current vehicle mounted terminal data agreement standard and data transmission basis, to vehicle position and form data

And carrying out encrypted transmission.

An encryption type vehicle-mounted terminal based on a security chip comprises a power supply module, an ACC monitoring circuit, an MCU, a storage module, the security chip, a mobile communication module and a positioning module, wherein the ACC monitoring circuit and the positioning module are both connected with the MCU through one-way signals, the ACC monitoring circuit transmits an ACC signal of a vehicle to the MCU, and the positioning module transmits a position signal of the vehicle to the MCU; the storage module, the security chip and the mobile communication module are all in bidirectional signal connection with the MCU; the power module provides complete machine power supply for the vehicle-mounted terminal.

And the MCU sends the received vehicle ACC signal and the vehicle position signal to the security chip for encryption, and the encrypted signal is sent to the mobile communication module and the storage module by the MCU.

And the mobile communication module sends the encrypted information to the MCU, the encrypted information is sent to the security chip by the MCU for decryption, and the decrypted information is sent back to the MCU.

And after the vehicle ACC signal is output, the ACC signal monitoring circuit detects that the ACC is input to high level and outputs the high level to the MCU after signal conversion.

And the security chip adopts SPI interface and MCU communication.

And the positioning module receives the positioning satellite signals to calculate the position and time information of the current vehicle, and the positioning module sends the position and time information of the vehicle to the MCU module.

And the MCU controls the state of the mobile communication module, the MCU sends data to the mobile communication module, and the mobile communication module wirelessly communicates with the mobile base station and sends the data to the remote communication server through a mobile network.

The utility model has the advantages and the technical effect be:

the utility model discloses an encryption type vehicle mounted terminal based on security chip adopts the hardware security chip to carry out data encryption and decryption, and the security is good can not be intercepted and cracked by illegal personnel; a safety chip hardware circuit is added on the basis of the existing vehicle-mounted terminal, the design is simple, and the cost for changing the data protocol standard is reduced; the encryption of the hardware security chip is higher than the encryption confidentiality of software, so that the leakage of the security from a design source can be avoided, and the vehicle information can not be leaked due to factors such as the cracking of the software or the existence of a back door of the software.

Drawings

FIG. 1 is a schematic circuit diagram of the present invention;

fig. 2 is a schematic diagram of signal transmission according to the present invention.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings. It should be noted that the present embodiment is illustrative, not restrictive, and the scope of the invention should not be limited thereby.

And the security chip adopts SPI interface and MCU communication.

Additionally, the utility model discloses preferably, orientation module is the ripe product among the prior art, and this orientation module adopts big dipper positioning system to carry out remote positioning, and orientation module receives the position and the time information that the satellite signal calculates current place, and orientation module sends position and time information for the MCU module.

In addition, the utility model discloses preferred, MCU (stm 32f 103), safety chip (SGC 1120).

To more clearly illustrate the embodiments of the present invention, an example is provided below:

power supply of the vehicle-mounted terminal: the power input end of the vehicle-mounted terminal is connected with a vehicle storage battery, the vehicle storage battery starts to provide 12V voltage for the power module of the vehicle-mounted terminal in the figure 1, the power module outputs the voltage required by each module of the whole machine, and the vehicle storage battery is disconnected with the power supply module to stop supplying power (namely after the vehicle is flamed out).

The method comprises the steps that the vehicle-mounted terminal is started, the ACC output end of an automobile is connected with the input end of the ACC detection circuit shown in the figure 1 of the vehicle-mounted terminal, the ACC in a flameout state of the automobile does not output level signals, the ACC outputs high level signals after the automobile is started, the ACC detection circuit of the vehicle-mounted terminal converts the high level signals of the ACC of the automobile into signals which can be identified by the MCU circuit, and the MCU controls all modules in the vehicle-mounted terminal to start to.

The vehicle-mounted terminal works, the MCU detects that the vehicle outputs an ACC high-level signal, thereby detecting that the vehicle is started, the MCU starts to control the positioning module, the communication module, the storage module, the safety chip and the like to start working, firstly, the MCU controls the positioning module to start working, the positioning module obtains the position and time information of the current vehicle through the positioning satellite, the positioning module sends the position and time information to the MCU, the MCU packs data and sends the data to the safety chip for encryption, the safety chip encrypts the data and sends the data to the MCU, the MCU controls the mobile communication module and the vehicle communication platform to establish a mobile data channel through the internet, the encrypted vehicle track point information is sent to a vehicle front-mounted server (shown in figure 2) through the mobile base station and the internet, the vehicle front-mounted server receives the encrypted data, sends the encrypted data to the encryption and decryption machine for decryption, the encryption and decryption machine decrypts the data and then sends the data to, and the vehicle front-end server sends the decrypted data to the vehicle management platform. If the mobile communication module and the vehicle management platform cannot establish data connection, the MCU controls the encrypted vehicle running track information to be stored in the storage module, and after the mobile data connection is recovered, the MCU controls the mobile communication module to send the encrypted data to the vehicle management platform.

After the vehicle is shut down, an ACC signal output by the vehicle is cut off, the ACC monitoring circuit monitors that no vehicle ACC signal exists, so that the MCU also detects that the vehicle without the ACC signal is shut down, the MCU controls the whole machine to enter a dormant state, and the communication frequency with the vehicle management platform is cut off or reduced, so that the purpose of saving energy is achieved.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. The utility model provides an encryption type vehicle mounted terminal based on security chip which characterized in that: the vehicle-mounted terminal comprises a power supply module, an ACC monitoring circuit, an MCU, a storage module, a safety chip, a mobile communication module and a positioning module, wherein the ACC monitoring circuit and the positioning module are both connected with the MCU through one-way signals, the ACC monitoring circuit transmits an ACC signal of a vehicle to the MCU, and the positioning module transmits a position signal of the vehicle to the MCU; the storage module, the security chip and the mobile communication module are all in bidirectional signal connection with the MCU; the power module provides complete machine power supply for the vehicle-mounted terminal.

2. The encryption type vehicle-mounted terminal based on the security chip according to claim 1, characterized in that: the MCU sends the received vehicle ACC signals and vehicle position signals to the security chip for encryption, and the encrypted signals are sent to the mobile communication module and the storage module by the MCU.

3. The encryption type vehicle-mounted terminal based on the security chip according to claim 1, characterized in that: the mobile communication module sends the encrypted information to the MCU, the encrypted information is sent to the security chip by the MCU for decryption, and the decrypted information is sent back to the MCU.

4. The encryption type vehicle-mounted terminal based on the security chip according to claim 1, characterized in that: the ACC signal output of the vehicle is connected with the input end of the ACC monitoring circuit, the output end of the ACC detection circuit is connected with the MCU, and after the ACC signal of the vehicle is output, the ACC signal monitoring circuit detects that the ACC is input with high level and outputs the high level to the MCU after signal conversion.

5. The encryption type vehicle-mounted terminal based on the security chip according to claim 1, characterized in that: the safety chip adopts an SPI interface to communicate with the MCU.

6. The encryption type vehicle-mounted terminal based on the security chip according to claim 1, characterized in that: the positioning module receives the positioning satellite signals to calculate the position and time information of the current vehicle, and the positioning module sends the position and time information of the vehicle to the MCU module.

7. The encryption type vehicle-mounted terminal based on the security chip according to claim 1, characterized in that: the MCU controls the state of the mobile communication module, the MCU sends data to the mobile communication module, the mobile communication module is in wireless communication with the mobile base station, and the data are sent to the remote communication server through the mobile network.