CN211606520U

CN211606520U - Security chip based on SIM function

Info

Publication number: CN211606520U
Application number: CN202020642932.7U
Authority: CN
Inventors: 熊浩; 周艳; 姜矿辉; 罗显成; 董传友; 郭子辰; 孙泳
Original assignee: Shanghai Dongxin Intelligent Technology Co ltd
Current assignee: Shanghai Dongxin Intelligent Technology Co ltd
Priority date: 2020-01-15
Filing date: 2020-04-24
Publication date: 2020-09-29
Anticipated expiration: 2030-04-24

Abstract

The utility model relates to a security chip based on SIM function, include: the safety chip comprises a power interface for supplying power to the safety chip and a data interface unit for performing data interaction with an external wireless communication module; set up ISO7816 protocol stack, SIM module unit, the three functional module of SE safety certification unit on the safety chip, ISO7816 protocol stack realize the data interaction with SIM module unit, SE safety certification unit communication respectively, ISO7816 protocol stack realize the data interaction with data interface unit communication the utility model discloses give up traditional SIM card hardware circuit, through at the in-process SIM card algorithm of integrating, realize the inside storage SIM card ID number of chip and relevant data parameter, greatly reduced the manufacturing cost of product.

Description

Security chip based on SIM function

Technical Field

The utility model belongs to the technical field of embedded terminal equipment, concretely relates to security chip based on SIM function realizes embedded terminal equipment's wireless communication SIM function, embedded safety control function.

Background

At present, in the technical field of embedded device security control, wireless internet data transmission of an embedded terminal device is generally realized by simultaneously installing an SIM card chip and an SE security chip on the terminal device, which causes the problem of incompatibility of software and hardware design and repeated design of resource functions, and also increases product cost.

Disclosure of Invention

An object of the utility model is to optimize prior art, introduce a novel chip based on SIM function and SE safety mechanism to simplify the design of software and hardware. The utility model discloses the technical scheme who adopts as follows:

a security chip based on SIM functionality, comprising: the safety chip comprises a power interface for supplying power to the safety chip and a data interface unit for performing data interaction with an external wireless communication module; the security chip is provided with three functional modules, namely an ISO7816 protocol stack, an SIM module unit and an SE security authentication unit, the ISO7816 protocol stack is communicated with the SIM module unit and the SE security authentication unit respectively to realize data interaction, and the ISO7816 protocol stack is communicated with the data interface unit to realize data interaction.

Preferably, the power interface receives an external high level VDD, and is used for supplying power to the security chip after linear voltage stabilization processing.

Preferably, the ISO7816 protocol stack is used for calculating, reading, modifying, writing parameters and data of the SIM module unit and the SE security authentication unit, and performing data interaction with an external wireless communication module through the data interface unit.

Preferably, the SIM module unit is configured to process SIM card functions, and store a SIM card ID number and related data and parameters.

Preferably, the SE secure authentication unit is configured to store a key and secure data.

Preferably, the data interface unit is a standard IIC interface, and is connected with an external wireless communication module to perform data interaction.

Preferably, the secure chip further comprises an RST reset pin for performing a chip reset action.

The utility model has the advantages that:

1) the utility model discloses collect terminal communication SIM function, embedded safety control function in an organic whole, satisfy customer identification module SIM card simultaneously and handle to reach functions such as the safe storage of embedded ESAM safety control module's data, the encryption and decryption of data, the discernment and the authentication of terminal identity. With the increasing emphasis on terminal data security, the method can be widely applied to various embedded terminal devices, copyright protection of embedded software, management of DRM digital copyright and other functional scenes.

2) The utility model is suitable for a wireless embedded safety control field to transmit terminal equipment's state information, safety data, control information to the internet end.

3) The utility model relates to a chip of general type for to the safety charging of all kinds of IC-cards, realize with the interaction of wireless communication Module (MCU) data, can be applied to various industrial control trades, such as the safe calculation and the transmission of being applied to all kinds of instrument core data such as water, electricity, coal wireless card table safety charging and transmission.

4) The utility model discloses give up traditional SIM card hardware circuit, through at the programmatic SIM card algorithm of integrating, realize the inside storage SIM card ID number of chip and relevant data and parameter, greatly reduced the manufacturing cost of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are illustrative of some embodiments of the invention, and that those skilled in the art will be able to derive other drawings without inventive step from these drawings, which are within the scope of the present application.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic diagram of an embodiment of the present invention;

fig. 3 is a schematic diagram of a chip package according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1, is a schematic structural diagram of an embodiment of the present invention; as shown in fig. 2, is a schematic diagram of the embodiment of the present invention; fig. 3 is a schematic diagram of a chip package according to an embodiment of the present invention. A security chip based on SIM function is used for realizing terminal communication SIM function and embedded security control function, and comprises: the safety chip comprises a power interface for supplying power to the safety chip and a data interface unit for performing data interaction with an external wireless communication module; the security chip is provided with three functional modules, namely an ISO7816 protocol stack, an SIM module unit and an SE security authentication unit, the ISO7816 protocol stack is communicated with the SIM module unit and the SE security authentication unit respectively to realize data interaction, and the ISO7816 protocol stack is communicated with the data interface unit to realize data interaction.

And the power interface receives an external high-level VDD, and is used for supplying power to the safety chip and each functional module after linear voltage stabilization treatment. The power interface is realized by hardware, and two pins VCC and GND are led out from the hardware and are respectively arranged on pins C8 and C1 of SOP-8 standard package.

The ISO7816 protocol stack is a control core of the chip and is realized by a software functional module; the protocol stack is used for calculating, reading, modifying and writing parameters and data of the SIM module unit and the SE security authentication unit, and data interaction is carried out with the external wireless communication module through the data interface unit.

The SIM module unit is used for processing the functions of the SIM card and storing the ID number of the SIM card and related data and parameters, the ISO7816 protocol stack reads and writes the SIM module unit and transmits the data of the SIM card to an external wireless communication module through the data interface unit, and the wireless communication module wirelessly accesses the Internet through the SIM card module unit. The utility model discloses traditional SIM card hardware circuit has been given up here, through at the programmatic SIM card algorithm of integrating, realizes the inside storage SIM card ID number of chip and relevant data and parameter.

The SE safety authentication unit is used for storing key, safety data and other important parameters, is a software functional module, is integrated in the chip, and integrates the SIM module unit and the SE safety authentication unit through a program. The external wireless communication module reads the secret key and the data acquired by the IC card, compares the secret key and the data with the data stored by the SE security authentication unit, generates a new secret key after data interaction is completed, and transmits the new secret key into the IC card through the wireless communication module. The so-called safe secret key is a safe character obtained by software and hardware calculation, just like a door lock and a key at home, and is realized through a software functional module.

The data interface unit is a standard IIC interface, and a data input/output interface (I/O) and a clock interface (CLK) are respectively connected to pins C3 and C6, so that the data interface unit is connected with an external wireless communication module and performs data interaction. The data interface unit is controlled by an ISO7816 protocol stack, and data interaction between the external wireless communication module and the SIM module unit and between the external wireless communication module and the SE security authentication unit is realized through the ISO7816 protocol stack.

In the embodiment of the utility model, the safety chip can be added with the RST reset pin C7; and when the wireless communication module judges that the chip has no response or returns an error code, the RST reset pin outputs a low level to the RST reset pin, and the chip executes reset action, so that the stability of the system is ensured.

The chip of the embodiment of the utility model adopts standard SOP-8 encapsulation, and its pin function is as follows:

TABLE 1-1

Pin	Function(s)	Pin	Function(s)
				C1	Ground (GND)	C8	Supply Voltage (VCC)
C2	Unused (NC)	C7	Reset Signal (RST)
				C3	Input/output (I/O)	C6	Clock signal (CLK)
C4	Unused (NC)	C5	Unused (NC)

With reference to table 1-1, pins C1 and C8 are power interfaces and are connected to the chip power interface; pins C3 and C6 are data interface units, and data interaction between the chip and an external wireless communication module is realized through the data interface units; c7 is RST reset pin, through which the wireless communication module performs reset action on the chip; the C2, C4, C5 pins were not used.

In the embodiment of the utility model, the functions of the SIM module unit and the SE security authentication unit are integrated in a hardware chip; and data interaction is carried out with an external wireless communication module through a data interface unit by utilizing a standard ISO7816 protocol stack.

The embodiment of the utility model provides an in, the optional model of security chip is DX 0881's chip, and the basic hardware of chip is brilliant former, and the chip is used on integrated circuit board. The SIM module unit, the SE security authentication unit and the ISO7816 protocol stack are all mounted in the DX0881 chip, and data interaction of the SIM module unit, the SE security authentication unit and the ISO7816 protocol stack is realized through the COS security system.

The embodiment of the utility model provides an in, realize ISO7816 protocol stack, SIM modular unit, SE safety certification unit's method through software function module, be prior art, no longer give unnecessary details here.

Finally, it is to be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A security chip based on SIM function, comprising: the safety chip comprises a power interface for supplying power to the safety chip and a data interface unit for performing data interaction with an external wireless communication module; the security chip is provided with three functional modules, namely an ISO7816 protocol stack, an SIM module unit and an SE security authentication unit, the ISO7816 protocol stack is communicated with the SIM module unit and the SE security authentication unit respectively to realize data interaction, and the ISO7816 protocol stack is communicated with the data interface unit to realize data interaction.

2. The security chip according to claim 1, wherein the power interface receives an external high level VDD, and is configured to supply power to the security chip after linear voltage stabilization.

3. The security chip according to claim 1, wherein the ISO7816 protocol stack is configured to calculate, read, modify, and write parameters and data of the SIM module unit and the SE security authentication unit, and perform data interaction with the external wireless communication module through the data interface unit.

4. The security chip of claim 1, wherein the SIM module unit is configured to handle SIM card functions, and store a SIM card ID number and associated data and parameters.

5. The security chip according to claim 1, wherein the SE security authentication unit is configured to store a key and security data.

6. The security chip according to claim 1, wherein the data interface unit is a standard IIC interface, and is connected to an external wireless communication module for performing data interaction.

7. The secure chip of any one of claims 1-6, further comprising a RST reset pin to perform a chip reset action.

8. The security chip of claim 7, wherein the security chip is packaged using standard SOP-8.

9. The security chip of claim 8, wherein the pins C1 and C8 are power interfaces, the pins C3 and C6 are data interface units, and the pin C7 is a RST reset pin.

10. The security chip of claim 9, wherein a DX0881 chip is selected.