A smart password key

Abstract

This utility model discloses a smart password key, including a security chip, a Type-C interface (1), a housing (2), and a cover (3). The security chip is connected to the Type-C interface (1) and is disposed in the housing (2). The cover (3) is provided with a slot, and the Type-C interface (1) is inserted into the slot. The smart password key of this utility model supports direct connection with smart terminals such as mobile phones, tablets, and PCs. It can effectively solve the problems of high cost and unstable data transmission of Bluetooth smart password keys and audio smart password keys. By applying the smart password key based on the Type-C interface (1), the smart password key is combined with a smartphone, realizing the widespread application of the smart password key and effectively improving the security of application services.

Description

1. Description of a Smart Password Key Technical Field This utility model relates to the field of information security technology, and more particularly to a smart password key. Background Art With the deepening of digital transformation, the requirements for identity authentication security in scenarios such as remote office and online transactions are increasing. The traditional "username + password" authentication method is easily cracked, while the smart password key, as a hardware-level security device, can improve security through "ownership + knowledge" two-factor authentication. Existing smart password keys have the following defects: contact interfaces (such as USB Type-A, audio interfaces) are large in size, have a fixed insertion direction, poor compatibility, and cannot be adapted to mainstream Type-C terminals; contactless interfaces (such as Bluetooth) require the integration of additional communication modules and batteries, resulting in high cost, low reliability, and data transmission being easily interfered with; some devices have insufficient material durability, are prone to oxidation and damage, affecting their service life. Therefore, this utility model provides a smart password key that is compatible with Type-C interfaces, small in size, highly compatible, low in cost, and highly secure. Summary of the Invention The purpose of this utility model is to provide a smart password key to solve the problems mentioned in the background art above. To achieve the above objectives, this utility model provides the following technical solution: A smart password key, comprising a security chip, a Type-C interface, a housing, and a cover; the security chip is connected to the Type-C interface, the security chip is disposed in the housing, the cover is provided with a slot, and the Type-C interface is inserted into the slot. Further, the security chip includes a CPU, SRAM, ROM, Eflash, an algorithm engine, a random number generator, and a power module; the SRAM, ROM, Eflash, algorithm engine, random number generator, and power module are respectively connected to the CPU, and the CPU is connected to the Type-C interface via a USB communication protocol. Further, the security chip is a VEBA5 chip, packaged in a QFN32 package; the algorithm engine supports SM2, SM3, and SM4 Chinese national cryptographic algorithms and AES and 3DES internationally recognized algorithms. Further, the power module includes a step-down converter circuit, which converts an externally input 5V voltage to 3.3V voltage and supplies power to the security chip. Furthermore, the Type-C interface is a 16-pin standard interface, with pins A4, A9, B4, and B9 all electrically connected to an external 5V power supply. Pins A7 and B7 are connected together to form a USB_DM signal terminal, and pins A6 and B6 are connected together to form a USB_DP signal terminal. Further, the housing is made of metal, and its surface is coated with a gilded electroplating layer.Further, the length of the shell does not exceed 60mm, the width does not exceed 20mm, and the thickness does not exceed 10mm. Further, the cover is made of metal. Further, a silicone liner is provided in the slot, which forms a sealing structure when the Type-C interface is inserted into the slot. The beneficial effects of this utility model are: the smart password key of this utility model supports direct connection with smart terminals such as mobile phones, tablets, and PCs, effectively solving the high cost and unstable data transmission of Bluetooth smart password keys and audio smart password keys. Through the application of the Type-C interface-based smart password key, the smart password key is combined with a smartphone, realizing the widespread application of the smart password key and effectively improving the security of application services. Brief Description of the Drawings To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 is a structural schematic diagram of this utility model. Figure 2 is an exploded structural schematic diagram of this utility model. Figure 3 is a connection circuit diagram of the Type-C interface of this utility model. Figure 4 is a step-down conversion circuit diagram of the security chip of this utility model. Figure 5 is a circuit diagram of the security chip of this utility model. It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner without affecting the reader's understanding. Detailed Description The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. In this utility model, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms (HK 30135234 A 3) are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationships; for example, the term "above" may in some cases indicate a dependency or connection relationship.For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to the specific circumstances. Furthermore, the terms "installation," "setting," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances. As shown in Figures 1 to 5, a smart password key includes a security chip, a Type-C interface 1, a housing 2, and a cover 3. Both the housing 2 and the cover 3 are made of austenitic steel. The housing 2 adopts a fully enclosed design, is completely opaque, and its surface is treated with a gilding electroplating process, which prevents oxidation, rust, and paint peeling. The length of the housing 2 does not exceed 60mm, the width does not exceed 20mm, and the thickness does not exceed 10mm. The security chip is designed as a single-chip solution, with its main component being a VEB A5 security chip. This chip uses a QFN32 (4*4*0.75mm) package, supports SM2, SM3, and SM4 cryptographic algorithm engines, features a true random number generator, and supports large-capacity secure storage, allowing for the secure storage of multiple keys and certificates. The security chip is directly integrated onto the PCB board and connected to the Type-C interface 1 via solder joints. The security chip is housed in the casing 2, and the cover 3 has a slot into which the Type-C interface 1 is inserted. This design makes the smart key compact and portable, effectively reducing its size and making it easy for users to carry. The slot in the cover 3 also has a silicone liner, which forms a seal when the Type-C interface 1 is inserted, providing waterproof and dustproof capabilities. Furthermore, a hook structure can be added to the casing or cover, allowing the smart key to be carried as a small pendant. In its specific implementation, the security chip of this application mainly comprises a CPU (main controller), SRAM, ROM, Eflash, an algorithm engine, a random number generator, and a power module. The SRAM, ROM, Eflash, algorithm engine, random number generator (supporting true random number generation), and power module are all connected to the CPU. The CPU is connected to Type-C interface 1 via USB communication protocol. As an example, the CPU (main controller) is a 32-bit RISC CPU, and the main controller is connected to the algorithm engine, SRAM, ROM, Eflash, random number generator, and power management module.Upper-layer applications in smart terminals call the cryptographic functions in the security chip through middleware interfaces, providing basic cryptographic services (such as encryption / decryption, random number generation, secure storage, etc.) to the upper layer. Communication is conducted via Type-C interface and USB communication protocol for data transfer. The main controller (CPU) is primarily responsible for reading instructions, decoding and executing instructions, including data processing. SRAM is mainly used to store data, variables, stack, and temporary data for the CPU to access when needed. ROM is used to store the loader boot program, key parameters, and some application programs in the security chip. Eflash is mainly used for storing programs and data, including the chip system, application programs, digital certificates, and keys. The algorithm engine provides Chinese national cryptographic algorithms SM2, SM3, and SM4, as well as internationally used algorithms AES and 3DES. When data requires encryption / decryption or signature verification, the CPU calls the algorithm engine to perform encryption / decryption or signature verification operations. The random number generator generates truly random numbers, which can be used as keys or other application data. The power module provides power control for the security chip, ensuring the stability of the chip's operating voltage. The smart key is inserted into the Type-C slot of the smart terminal through Type-C interface 1. The terminal supplies power to the security key through Type-C interface 1, providing a voltage of 5V. The power module inside the security key converts the voltage to 3.3V, providing the chip with a normal operating voltage. As an example, Type-C interface 1 uses a standard Type-C 16-pin interface. Its pins A4, A9, B4, and B9 (VBUS) are electrically connected to the external 5V power supply terminal (+5V_VUSB) to provide a 5V external voltage to the security chip; it is also connected to OTR_VBUS (19) in the security chip circuit to provide a 5V operating voltage. Specifically, the buck converter VDD in the buck converter circuit is connected to the Type-C interface 1. The buck converter converts the 5V voltage to 3.3V and outputs +3.3V_VDD through VOUT, which is then connected to the security chip VCCQ to provide the security chip with a 3.3V operating voltage. In addition, pin A7 (DN1) of the Type-C interface 1 is connected to B7 (DN2) corresponding to USB_DM (data negative signal), and pin A6 (DP1) is connected to B6 (DP2) corresponding to USB_DP (data negative signal). The security chip DP (23) and DM (22) are connected to USB_DP (data negative signal) and USB_DM (data negative signal) respectively to realize the connection and transmission of data signals. The other working circuit parts of the security chip will not be described in detail here.The smart password key of this application supports direct connection with smart terminals such as mobile phones, tablets, and PCs, effectively solving the problems of high cost and unstable data transmission of Bluetooth smart password keys and audio smart password keys. By combining the smart password key with smartphones through the application of a Type-C interface, the smart password key can be widely used, effectively improving the security of application services. Regarding the embodiments of this utility model, it should be noted that, without conflict, the embodiments and features of the embodiments of this utility model can be combined with each other to obtain new embodiments. The above description is only a preferred embodiment of this utility model and is not intended to limit the utility model in any way. The scope of protection of this utility model should be determined by the scope of the claims. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention. HK 30135234 A 1 Claim 1. A smart password key, characterized in that it includes a security chip, a Type-C interface (1), a housing (2) and a cover (3); the security chip is connected to the Type-C interface (1), the security chip is disposed in the housing (2), the cover (3) is provided with a slot, and the Type-C interface (1) is inserted into the slot. 2. The smart password key according to claim 1, wherein the security chip comprises a CPU, SRAM, ROM, Eflash, an algorithm engine, a random number generator, and a power module; the SRAM, ROM, Eflash, algorithm engine, random number generator, and power module are respectively connected to the CPU, and the CPU is connected to the Type-C interface (1) via a USB communication protocol. 3. The smart password key according to claim 2, wherein the security chip is a VEBA5 chip, packaged in QFN32; the algorithm engine supports SM2, SM3, and SM4 national cryptographic algorithms and AES and 3DES international universal algorithms. 4. The smart password key according to claim 2, wherein the power module comprises a step-down converter circuit, which converts the externally input 5V voltage to 3.3V voltage and supplies power to the security chip.5. The smart password key according to claim 1, wherein the Type-C interface (1) is a 16-pin standard interface, and its pins A4, A9, B4, and B9 are all electrically connected to an external 5V power supply terminal, pins A7 and B7 are connected together to form a USB_DM signal terminal, and pins A6 and B6 are connected together to form a USB_DP signal terminal. 6. The smart password key according to claim 1, wherein the housing (2) is made of metal and its surface is provided with a gilded electroplating layer. 7. The smart password key according to claim 1, wherein the length of the housing (2) does not exceed 60mm, the width does not exceed 20mm, and the thickness does not exceed 10mm. 8. The smart password key according to claim 1, wherein the cover (3) is made of metal. 9. The smart password key according to claim 1, wherein a silicone liner is also provided in the slot, and the silicone liner forms a sealing structure when the Type-C interface (1) is inserted into the slot. HK 30135234 A 1 Instruction Manual Attachments Figure 1 Figure 2 HK 30135234 A 2 Figure 3 Figure 4 HK 30135234 A 3 Figure 5 HK 30135234 A.