Safe and credible module of power distribution terminal

Abstract

The utility model relates to a safe and credible module of a power distribution terminal, which comprises a circuit board, and the circuit board is provided with a first micro-control unit, a second micro-control unit, a first encryption and decryption chip, a second encryption and decryption chip and an external interface. The first micro-control unit and the second micro-control unit are connected through a serial interface; the first micro-control unit is connected with the first encryption and decryption chip through a serial peripheral interface of the first micro-control unit, and the second micro-control unit is connected with the second encryption and decryption chip through a serial peripheral interface of the second micro-control unit; the first micro-control unit and the second micro-control unit are both connected with the external interface, and the external interface is used for being connected with a power distribution terminal. According to the utility model, the applicability of the power distribution terminal can be improved, and customized services aiming at user requirements are realized.

Description

Technical Field

[0001] The utility model relates to a distribution network Internet of Things terminal, in particular to a distribution terminal safety and trustworthiness module. Background Art

[0002] A large number of devices in existing power distribution lines have communication functions, which can be operated and maintained or connected to a host computer system with a communication interface through various communication methods. However, due to the wide distribution of power distribution terminal equipment, multiple application scenarios, and complex and changeable on-site working conditions, many nodes in data communication are exposed, which poses a hidden danger to safe and reliable data communication. To solve this problem, the existing power distribution terminal encryption and decryption solutions are usually implemented by setting a built-in chip in the terminal device. However, due to the single algorithm of the built-in chip and low applicability, it is impossible to customize services according to user needs. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a safe and reliable module for a power distribution terminal, which can improve the applicability of the power distribution terminal and realize customized services according to user needs.

[0004] The technical solution adopted by the utility model to solve its technical problems is: to provide a safe and trusted module for a distribution terminal, including a circuit board, on which a first microcontroller unit, a second microcontroller unit, a first encryption and decryption chip, a second encryption and decryption chip and an external interface are arranged; the first microcontroller unit and the second microcontroller unit are connected via a serial interface; the first microcontroller unit is connected to the first encryption and decryption chip via its own serial peripheral interface, and the second microcontroller unit is connected to the second encryption and decryption chip via its own serial peripheral interface; the first microcontroller unit and the second microcontroller unit are both connected to the external interface, and the external interface is used to be connected to the distribution terminal.

[0005] The circuit board is also provided with a power module, and the power module is used to supply power to the first micro control unit, the second micro control unit, the first encryption and decryption chip, and the second encryption and decryption chip.

[0006] The circuit board is also provided with a debugging serial port, the first micro control unit and the second micro control unit are both connected to the debugging serial port, and the debugging serial port is used to connect to a debugging device.

[0007] The first micro control unit and the second micro control unit are connected via a Uart serial interface.

[0008] The first micro control unit is connected to the external interface via its own SPI interface and IO interface; the second micro control unit is connected to the external interface via its own SPI interface and IO interface.

[0009] The circuit board is a rectangular circuit board, and a stamp packaging interface is used on the periphery.

[0010] The first micro control unit and the second micro control unit are both micro control units of the RISC-V instruction set.

[0011] Beneficial Effects

[0012] Due to the adoption of the above technical solution, the utility model has the following advantages and positive effects compared with the prior art: the utility model adopts a dual MCU structure, and communicates and connects the service terminal equipment through SPI mode, which can improve the applicability of the distribution terminal, realize customized services for user needs, is convenient and flexible, and has simple configuration. It can increase the MCU soft encryption service and multiple and cross encryption to increase the strength, and can provide a safe and reliable encryption function for the communication of the distribution terminal equipment. The utility model adopts a single circuit board structure, the circuit board size is 15*30mm, the volume is small, and a stamp packaging interface is provided around it. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural block diagram of the safe and reliable module of the power distribution terminal of the utility model. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0015] The embodiment of the utility model relates to a power distribution terminal security and trust module, including a circuit board, such as Figure 1As shown, the circuit board is provided with a first microcontroller unit (MCU1), a second microcontroller unit (MCU2), a first encryption and decryption chip, a second encryption and decryption chip and an external interface. The first microcontroller unit and the second microcontroller unit are connected via a serial interface, and in this embodiment, the first microcontroller unit and the second microcontroller unit are connected via two Uart serial interfaces (Uart3 and Uart4). The first microcontroller unit is connected to the first encryption and decryption chip via its own serial peripheral interface (U1_SPI2), and the second microcontroller unit is connected to the second encryption and decryption chip via its own serial peripheral interface (U2_SPI2). The first microcontroller unit and the second microcontroller unit are both connected to the external interface, and the external interface is used to be connected to the power distribution terminal, wherein the first microcontroller unit is connected to the U1 external interface via its own U1_SPI1 interface and GPIO interface, and the second microcontroller unit is connected to the U2 external interface via its own U2_SPI1 interface and GPIO interface, and the U1_SPI1 interface and the U2_SPI1 interface can set the communication rate.

[0016] In this embodiment, a power module is also provided on the circuit board, and the power module adopts a 3.3V power supply, which is used to power the first micro control unit, the second micro control unit, the first encryption and decryption chip, and the second encryption and decryption chip. In this embodiment, two debugging serial ports are also provided on the circuit board, the first micro control unit is connected to the U1 debugging serial port, and the second micro control unit is connected to the U2 debugging serial port, and the debugging serial port is used to connect to the debugging device.

[0017] It is not difficult to find that this implementation adopts a dual MCU structure, the dual chips can authenticate each other, and communicate and connect to the service terminal equipment via SPI. The service content and instructions can be customized according to user needs. It is convenient and flexible, and the configuration is simple. It can increase the MCU soft encryption service and multiple and cross-encryption to increase the strength, and can provide secure and reliable encryption functions for the communication of distribution terminal equipment.

[0018] In addition, the overall components of this embodiment are relatively small, including only 2 MCUs, 2 encryption and decryption chips, a power supply and an external interface. The overall power consumption of the entire device is low, and it is suitable for various circuit board structures. The circuit board in this embodiment can be a rectangular circuit board. Since there are fewer devices on the circuit board, its size can be set to 15*30mm, and a stamp packaging interface is used around the circuit board. This packaging method can make the installation of the power distribution terminal security and reliable module of this embodiment flexible and convenient. The circuit board of this embodiment can provide a shielding cover installation hole, and electromagnetic radiation and electromagnetic interference attacks can be eliminated by installing a shielding cover. In this embodiment, it is not only connected to the external interface through the SPI interface, but also connected to the external interface through the GPIO interface. Various interfaces can be simulated through the GPIO interface to meet the needs of earlier devices.

[0019] In this embodiment, the first microcontroller unit and the second microcontroller unit can both adopt microcontroller units of the RISC-V instruction set, for example, a CH203C8T6 chip. The CH203C8T6 chip is a domestic chip that can be produced by many domestic MCU manufacturers and is not affected by component supply factors.

[0020] When using the power distribution terminal security and trust module of this embodiment, you only need to use the SPI interface to connect the power distribution terminal, and then call the encryption and decryption chip in the power distribution terminal security and trust module in conjunction with the instructions of the distribution terminal to meet the encryption and decryption communication requirements. The MCU of the power distribution terminal security and trust module of this embodiment can store up to 127 certificates and keys, and can perform a variety of signature verification, authentication and encryption services under the instructions of the distribution terminal, thereby realizing customized services for user needs.

Claims

1. A power distribution terminal security and trust module, characterized in that: It includes a circuit board, on which a first microcontroller unit, a second microcontroller unit, a first encryption and decryption chip, a second encryption and decryption chip and an external interface are arranged; the first microcontroller unit and the second microcontroller unit are connected via a serial interface; the first microcontroller unit is connected to the first encryption and decryption chip via its own serial peripheral interface, and the second microcontroller unit is connected to the second encryption and decryption chip via its own serial peripheral interface; the first microcontroller unit and the second microcontroller unit are both connected to the external interface, and the external interface is used to be connected to a power distribution terminal.

2. The power distribution terminal security and trust module according to claim 1, characterized in that: The circuit board is also provided with a power module, and the power module is used to supply power to the first micro control unit, the second micro control unit, the first encryption and decryption chip, and the second encryption and decryption chip.

3. The power distribution terminal security and trust module according to claim 1, characterized in that: The circuit board is also provided with a debugging serial port, the first micro control unit and the second micro control unit are both connected to the debugging serial port, and the debugging serial port is used to connect to a debugging device.

4. The power distribution terminal security and trust module according to claim 1, characterized in that: The first micro control unit and the second micro control unit are connected via a Uart serial interface.

5. The power distribution terminal security and trust module according to claim 1, characterized in that: The first micro control unit is connected to the external interface via its own SPI interface and IO interface; the second micro control unit is connected to the external interface via its own SPI interface and IO interface.

6. The power distribution terminal security and trust module according to claim 1, characterized in that: The circuit board is a rectangular circuit board, and a stamp packaging interface is used on the periphery.

7. The power distribution terminal security and trust module according to claim 1, characterized in that: The first micro control unit and the second micro control unit are both micro control units of the RISC-V instruction set.

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