Circuit and system for transmitting data

Abstract

The utility model discloses a data transmission circuit and system, and the circuit comprises a connection module which is detachably connected with a data transmitting end; the first end of the control chip is electrically connected with the data connection module; the data encryption card connection module is electrically connected with the second end of the control chip; the communication module is electrically connected with the control chip; data are encrypted through the data encryption card connected with the data encryption card connection module to obtain encrypted data, the encrypted data are transmitted to the communication module through the control chip, and the encrypted data are sent to the data receiving end through the communication module, so that the data can be encrypted firstly and then transmitted, and the security during data transmission is improved.

Description

Technical Field

[0001] The present application belongs to the field of electronic circuit technology, and in particular relates to a circuit and system for transmitting data. Background Art

[0002] A data card is a device that enables data transmission over a network. When connected to a user device, such as a computer, mobile phone, or tablet, the user can transfer data to other devices via the network using the data card. However, data leakage during data card transmission can present security concerns. Utility Model Content

[0003] The embodiments of the present application provide a circuit and system for transmitting data, which realizes encrypted transmission of data and improves the security of data transmission.

[0004] In a first aspect, an embodiment of the present application provides a circuit for transmitting data, including:

[0005] A connection module, the connection module is detachably connected to the data sending end;

[0006] A control chip, wherein a first end of the control chip is electrically connected to the connection module;

[0007] A data encryption card connection module, the data encryption card connection module is electrically connected to the second end of the control chip;

[0008] A communication module, the communication module is electrically connected to the control chip;

[0009] The encrypted data card encrypts the data in response to receiving the data to obtain encrypted data. The encrypted data card connection module transmits the encrypted data to the control chip. The control chip transmits the encrypted data to the communication module in response to receiving the encrypted data. The communication module sends the encrypted data to the data receiving end.

[0010] In a second aspect, an embodiment of the present application provides a system for transmitting data, including:

[0011] An encryption memory card, a user identification card, and a circuit for transmitting data as shown in the first aspect, wherein the circuit for transmitting data and the data encryption card and the user identification card are all detachably connected.

[0012] The circuit and system for transmitting data provided in the embodiments of the present application are detachably connected to the data sending end through a connecting module. The connecting module can receive data sent by the data sending end. The control chip is electrically connected to the connecting module, the data encryption card connecting module and the communication module. When the data encryption card connecting module is detachably connected to the encryption storage card, the encryption storage card can encrypt the data in response to the first control instruction of the control chip to obtain encrypted data, and send the encrypted data to the data receiving end through the communication module, thereby realizing the process of encrypting the data and then transmitting it, improving the security of data transmission, and solving the data leakage problem that may be caused when transmitting data through the data card in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 A schematic diagram of a data transmission system provided in some embodiments of the present application.

[0015] Figure 2 A schematic diagram of a circuit for transmitting data provided in some embodiments of the present application.

[0016] Figure 3 Another circuit diagram for transmitting data provided in some embodiments of the present application.

[0017] Figure 4 A schematic diagram of a data card provided in some embodiments of the present application. DETAILED DESCRIPTION

[0018] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0019] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0020] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0021] Currently, data cards are increasingly used as devices for transmitting data. Users often use the networking capabilities of data cards to transmit data from a data transmitter to a data receiver. For example, if the data card is detachably connected to a user device, data from the user device can be transferred to other devices based on the data card. However, transmitting data via a data card over a network may result in data leakage caused by network attacks, impacting the user experience. To address this issue, embodiments of the present application provide a data transmission circuit and system that can address these issues. Below, a detailed description of a data transmission circuit provided in embodiments of the present application is provided.

[0022] In some embodiments, as Figure 1 As shown, an embodiment of the present application provides a system for transmitting data, which may include:

[0023] Encryption memory card 101, user identification card 102 and data transmission circuit 103.

[0024] Among them, the above-mentioned circuit for transmitting data can be a circuit in a data card, wherein the circuit for transmitting data can be detachably connected to the data encryption card and the user identity identification card. The circuit for transmitting data can include a data encryption card connection module, such as a data encryption card slot. The circuit for transmitting data is used to transmit data to the encryption storage card, encrypt the data through the encryption storage card, and obtain decrypted data. The circuit for transmitting data can also include a user identity identification card connection module. Here, the user identity identification card connection module can be a user identity identification card slot. Through the user information provided by the user identity identification card, a connection is established with the communication gateway to upload encrypted data.

[0025] The embodiment of the present application sets up the above-mentioned data transmission system, which can realize data encryption before transmission, and can improve the security of data transmission.

[0026] In some embodiments, as Figure 2 As shown, an embodiment of the present application provides a circuit for transmitting data, which may include:

[0027] A connection module 201 is detachably connected to the data sending end;

[0028] A control chip 202, a first end of the control chip is electrically connected to the connection module 201;

[0029] The data encryption card connection module 203 is electrically connected to the second end of the control chip 202;

[0030] The communication module 204 is electrically connected to the control chip 202 .

[0031] The data transmitting end may be a user device, such as a mobile phone, a computer, or a tablet device. The connection module 201 may be an interface device that can be detachably connected to the above-mentioned data transmitting end. In the case where the data transmitting end is a computer device, the connection module 201 may be a Universal Serial Bus (USB) interface. In the case where the data transmitting end is a mobile phone or a tablet device, the connection module 201 may be a Type-C interface device or other interface device, which will not be further described here.

[0032] The control chip 202 may be a microcontroller unit (MCU). Through the control chip 202 , different modules connected to the control chip 202 can be controlled to work.

[0033] The data encryption card connection module 203 is a module that can be detachably connected to a data encryption card. The data encryption card can be a TF encryption card. The received data is encrypted by the data encryption card to implement the data encryption function.

[0034] In some instances, the TF card stores multiple encryption algorithms, and data is encrypted using these algorithms. The encryption algorithm can be a hash algorithm, such as AES, DES, or 3DES, or a national secret algorithm, such as SM1, SM2, SM3, or SM4. These algorithms allow data to be encrypted when the data card is uploaded, and decrypted when the data card is downloaded.

[0035] The communication module 204 can be a communication module 204 capable of connecting to a network, such as a 5th Generation Mobile Communication Technology (5G) module. By connecting to a gateway via the communication module 204, encrypted data is sent to a data receiving end via the communication module 204, thereby achieving encrypted data transmission. In some embodiments, the method flow of the data transmission circuit includes: the connection module 201 receives data sent by a data sending end, the control chip 202 generates a first control instruction in response to the data output by the connection module 201, the control chip transmits the first control instruction to the data encryption card connection module 203, the data encryption card in the data encryption card connection module encrypts the data in response to the first control instruction and data of the control chip 202 to obtain encrypted data, the encrypted data card connection module 203 transmits the encrypted data to the control chip 202, the control chip 202 transmits the encrypted data to the communication module in response to receiving the encrypted data, and the communication module 204 transmits the encrypted data to the data receiving end in response to the encrypted data transmitted by the control chip 202.

[0036] When the connection module 201 is detachably connected to the data sending end, the connection module 201 can receive data sent by the data sending end, and the connection module 201 can send the above data to the control chip 202. The control chip 202 generates a first control instruction based on the data, and the first control instruction carries data. The control chip 202 can send the above first control instruction to the data encryption card connection module 203, and encrypt the data based on the first control instruction through the data encryption card detachably connected to the data encryption card connection module 203 to obtain encrypted data. The data encryption card transmits the data to the control chip 202, and the control chip 202 sends the encrypted data to the communication module 204, and sends the encrypted data to the data receiving end based on the communication module 204.

[0037] The embodiment of the present application adds a data encryption card connection module 203 to the data card, and encrypts the data set in response to the first control instruction and data sent by the control module through the data encryption card connection module 203 to obtain encrypted data, which can protect data security. The encrypted data is then sent to the communication module 204 through the control chip 202, and the communication module 204 sends the encrypted data to the data receiving end, thereby realizing the process of encrypting the data before transmitting it, improving the security of data transmission, and solving the data leakage problem that may be caused when transmitting data through the data card in the prior art.

[0038] In some embodiments, in order to further improve the security of data transmission, the communication module 204 includes a network connection protocol, such as the (IP Security, IPSec) protocol. The communication module 204 can establish a secure connection tunnel with the security gateway through the network connection protocol, and transmit encrypted data through the above-mentioned secure connection tunnel to further improve the security of data transmission.

[0039] In some embodiments, as Figure 3 As shown, the communication module 204 includes a user identity card connection module 301 and a data transmission module 302. The user identity card connection module 301 is electrically connected to a first end of the data transmission module 302, and a second end of the data transmission module 302 is electrically connected to the control chip 202; the user identity card connection module 201 is used to detachably connect a user identity card.

[0040] Here, the communication module may include Figure 3 The user identity card connection module 301 and the data transmission module 302 shown in the figure, the user identity card connection module 301 can be a module that is detachably connected to the user identity card. For example, the user identity card connection module 301 can be a user identity card slot, and the user can insert the user identity card based on the above-mentioned user identity card slot.

[0041] In some embodiments, based on the above communication module including the identity card connection module and the data transmission module 302, the user identity can be verified when the connection module is connected to the data sending end, thereby improving the security of data transmission.

[0042] The above-mentioned identity authentication process is as follows: the removable user identity card sends identity information to the data transmission module 302, the data transmission module 302 sends the identity information to the control chip 202, the control chip 202 generates an authentication request in response to the identity information, and sends the authentication request to the data sending end; here, the data sending end can display the authentication information carried in the authentication request, such as displaying QR code information, and the user can scan the QR code based on the user device and send the user information to the connection module 201. Alternatively, the data sending end can collect user information including the user's facial information or fingerprint information in response to the above-mentioned authentication information, and the connection module 201 sends the above-mentioned user information to the control chip 202. Based on the above-mentioned verification method, the user's identity can be verified.

[0043] The control chip 202 generates a second control instruction in response to receiving user information. The second control instruction carries user information and identity information. The data encryption card queries the information corresponding to the identity information in response to the second control instruction transmitted by the control chip 202 and verifies whether the information includes the above-mentioned user information. The data encryption card generates response information in response to the query that the information includes the above-mentioned user information. The control chip 202 generates a third control instruction in response to the above-mentioned response information transmitted by the data encryption card. The data transmission module 302 sends encrypted data to the data receiving end in response to the third control instruction transmitted by the control chip 202.

[0044] When the embodiment of the present application is connected to the user identity identification card connection module 301 through the user identity identification card, the identity information transmitted by the user identity identification card and the user information sent based on the data sending end are sent to the data encryption card through the control chip 202, and the data encryption card verifies whether the information corresponding to the identity information stored in the data encryption card includes the above-mentioned user information. When it is determined that the information includes the user information, the data encryption card sends a response message to the control chip 202, so that the control chip 202 generates a third control instruction, instructing the data transmission module 302 to send encrypted data to the data receiving end. The above method can verify the identity of the user before transmitting data, and can further improve the data security during data transmission.

[0045] In some embodiments, as Figure 3 As shown, the connection module 201 may include an interface 2011 and an interface chip 2012, the first end of the interface is detachably connected to the data sending end, the second end of the interface is electrically connected to the first end of the interface chip, the second end of the interface chip is electrically connected to the control chip 202, and the interface chip is used to receive data sent by the data sending end.

[0046] Here, the interface can be the USB interface or other interface mentioned above, and the connection module 201 can include an interface chip. It can be imagined that the second end of the above-mentioned interface can be detachably electrically connected to the first end of the interface chip. By setting the interface chip, it is possible to set an interface based on the interface chip to adapt to different types of interfaces, realize the connection between the circuit for transmitting data and different types of data sending ends, and improve the user experience.

[0047] To achieve normal use of the circuit for transmitting data, such as Figure 3 The circuit for transmitting data may also include a step-down module 303, wherein the first end of the step-down module 303 is electrically connected to the second end of the interface, and the second end of the step-down module is electrically connected to the first end of the interface chip. The step-down module is used to reduce the first voltage provided by the data sending end to a second voltage.

[0048] Here, a step-down module 303 can be set up, which can reduce the first voltage provided by the data sending end to a second voltage, for example, reduce the first voltage of 5V provided by the data sending end to a second voltage of 3.3V, and provide voltage to the circuit that transmits data through the second voltage to achieve normal use of the above circuit.

[0049] In some embodiments, as Figure 3 As shown, the step-down module 303 includes a first capacitor C1, a second capacitor C2 and a first inductor L1, the first end of the first capacitor is electrically connected to the second end of the interface 2011, the second end of the first capacitor is electrically connected to the reference voltage end, the second capacitor is connected in parallel with the first capacitor, the first end of the first inductor is electrically connected to the second end of the interface 2011, and the second end of the first inductor is electrically connected to the first end of the interface chip 2012.

[0050] Through the above-mentioned step-down module 303 including the first capacitor C1, the second capacitor C2 and the first inductor L1, the voltage provided by the data sending end can be reduced, and voltage can be provided to the interface chip 2012 based on the reduced second voltage, thereby realizing the normal use of the interface chip 2012 and enabling data to be transmitted from the data sending end to the interface chip 2012.

[0051] In some embodiments, as Figure 3 As shown, the data encryption card connection module 203 includes a power interface VD1 , which is electrically connected to the second end of the voltage reduction module 303 .

[0052] In some embodiments, as Figure 3 As shown, the control chip 202 includes a first power pin VDD, which is electrically connected to the second end of the step-down module 303 by setting the power interface of the data encryption card connection module 203, so that the second voltage can provide the control chip 202 with the voltage required by the control chip 202, and can realize the data encryption process, the identity authentication process and the encrypted data transmission process based on the control of the control chip 202.

[0053] In some embodiments, as Figure 3 As described above, the user identity card connection module 301 includes a first power interface VCC, which is electrically connected to a first power pin of the control chip 202 to achieve normal use of the user identity card connection module 301.

[0054] In some embodiments, as Figure 3 As shown, the circuit may further include a voltage stabilizing module 304 , a first end of the voltage stabilizing module 304 is electrically connected to a second end of the voltage reducing module 303 , and a second end of the voltage stabilizing module is electrically connected to a first end of the interface chip.

[0055] Here, as Figure 3The voltage stabilizing module 304 may include a first voltage stabilizing tube Z1. By configuring the voltage stabilizing tube Z1, the voltage of the input interface chip can be stabilized, that is, the second voltage can be stabilized to improve the stability of the second voltage.

[0056] In some embodiments, as Figure 3 As shown, the circuit may further include a filter module 305 , a first end of the filter module 305 is electrically connected to the connection module 201 , and a second end of the filter module 305 is electrically connected to the control chip 202 .

[0057] Here, the filtering module may be an inductive capacitor. By providing the filtering module 305 , the data output by the connection module 201 can be filtered, thereby improving the accuracy of the data received by the control chip 202 .

[0058] In some embodiments, as Figure 3 As shown, the control chip 202 includes at least one data transmission pin, and the data encryption card connection module 203 includes at least one data transmission interface, one data transmission interface is electrically connected to one data transmission pin, for example Figure 3 The data transmission interface includes DATE1 and DATE2, and the data transmission pins include SD1 and SD2. The circuit also includes a reset module 306, which is electrically connected to the data transmission interface and the data transmission pins. The reset module 306 is used to pull the potential of the data transmission interface and the data transmission pins to a preset potential.

[0059] The reset module 306 can pull the potential of the data transmission interface and the data transmission pin to a preset potential, which can be a high level. When the data transmission pin of the control module sends data to the data transmission interface of the data encryption card connection module 201, the control chip 202 can control the potential of the data transmission pin to become a low level. The potential of the data transmission interface will fall below the preset threshold and become a low level. The potential of the data transmission pin and the data transmission interface will be synchronized. Based on the above method, the control chip 202 can transmit data to the data encryption card. By setting up the reset module, data transmission between the control module and the data encryption card is facilitated.

[0060] In some embodiments, as Figure 3As shown, the reset module 306 may include a power supply terminal V and at least one first resistor R1, wherein the power supply terminal is electrically connected to the second terminal of the step-down module 303, the first end of the first resistor R1 is electrically connected to the power supply terminal V, and the second end of the first resistor R1 is electrically connected to both the data transmission interface and the data transmission pin. Here, one of the first resistors R1 is provided between one of the data transmission interface and one of the data transmission pins. By providing the first resistor R1, the voltage from the power supply terminal to the data transmission interface and the data transmission pin can be reduced, thereby protecting the control chip 202 and the data encryption card connection module 203.

[0061] In some examples, the power terminal V may be electrically connected to the second terminal of the step-down module 303 .

[0062] In some embodiments, as Figure 3 As shown, the user identity card connection module 301 includes at least one first transmission interface, the data transmission module 302 includes at least one first transmission pin, and one of the first transmission interfaces is electrically connected to one of the first transmission pins. By setting at least one first transmission interface, the user identity card connection module 201 can be adapted to the user identity card, and at the same time, a first transmission pin is electrically connected to a first transmission interface, so that when the user identity card is connected to the user identity card connection module 301, identity information can be sent to the data transmission module 302 through the user identity card to verify the user identity and establish a network connection with the gateway after the verification is passed. In some examples, the first transmission interface may include the following: Figure 3 The first data transmission interface IO, the first clock signal interface CLK and the first reset signal interface RST are shown. Correspondingly, the first transmission pins include a first data transmission pin UDATE, a first clock signal pin UCLK and a first reset signal pin URST.

[0063] In some embodiments, as Figure 3 As shown, the data transmission circuit further includes at least one second resistor R2, the first end of the second resistor being electrically connected to the first transmission interface, the second end of the second resistor being electrically connected to the first transmission pin, and a second resistor being arranged between a first transmission interface and a first transmission pin. By setting the second resistor, a voltage reduction effect can be achieved between the first transmission interface and the first transmission pin, thereby protecting the data transmission module 302 and the user identity card connection module 301.

[0064] In some embodiments, as Figure 3As shown, the data transmission circuit also includes a first reset module 307, a first end of the first reset module 307 is electrically connected to the reference voltage terminal GND, and a second end of the first reset module 307 is electrically connected to the second end of the second resistor R2 and the first transmission pin. The first reset module 307 is used to pull the potential of the second end of the second resistor R2 and the first transmission pin to a first potential, where the first potential can be a low level. By providing the above-mentioned first reset module 307, the second end of the second resistor and the first transmission pin can be kept at a low level when the user identity card and the data transmission module 302 are not communicating, thereby reducing the occupation of communication resources. Here, it can be imagined that when the user identity card sends identity information to the data transmission module 302, the potential of the first transmission interface is high, and the high level can be transmitted to the first transmission pin, and the potential of the first transmission pin is set to a high level.

[0065] In some embodiments, as Figure 3 As shown, the first reset module includes at least one third capacitor C3, the first end of the third capacitor C3 is electrically connected to the reference voltage end, and the second end of the third capacitor C3 is electrically connected to the second end of the second resistor R2 and the first transmission pin. By setting a first reset module 307 including at least one third capacitor C3, it is possible to set the potential of the second end of the second resistor R2 and the first transmission pin to the first potential based on the third capacitor C3 at a low cost.

[0066] In some embodiments, as Figure 3 As shown, the data transmission circuit further includes a third resistor R3 and a fourth resistor R4. The third resistor R3 is disposed between the control pin SD of the control chip 202 and the control interface CARD of the data encryption card connection module 203 to provide a voltage reduction function, thereby protecting the control chip 202 and the data encryption card connection module 203. Simultaneously, the fourth resistor R4 is disposed between the drive pin SDWP of the control chip 202 and the reference voltage terminal to reduce the voltage between the control drive pin and the reference voltage terminal, thereby protecting the control chip 202.

[0067] In some embodiments, as Figure 3 In the case where the interface is a USB interface, the interface chip 2012 may include a positive data transmission pin D+ and a negative data transmission pin D-, wherein the first end of the filter module is electrically connected to both the positive transmission pin and the negative transmission pin, and the second end of the filter module is electrically connected to both the positive transmission pin DM and the negative transmission pin DP of the control chip 202, wherein the positive transmission pin DM is used to receive data transmitted by the positive data transmission pin D+, and the negative transmission pin DP is used to receive data transmitted by the negative data transmission pin D-.

[0068] In some embodiments, as Figure 3As shown, the data transmission circuit also includes a second voltage-stabilizing tube Z2 and a third voltage-stabilizing tube Z3. The first end of the second voltage-stabilizing tube Z2 is electrically connected to the positive data transmission pin D+, and the second end of the second voltage-stabilizing tube Z2 is electrically connected to the reference voltage terminal GND. The first end of the third voltage-stabilizing tube Z3 is electrically connected to the negative data transmission pin, and the second end of the third voltage-stabilizing tube Z3 is electrically connected to the reference voltage terminal. By providing the second voltage-stabilizing tube Z2 and the third voltage-stabilizing tube Z3, the voltages of the positive data transmission pin D+ and the negative data transmission pin D- can be stabilized, thereby improving the accuracy of data transmission.

[0069] Based on the same inventive concept, the embodiment of the present application provides a data card, such as Figure 4 As shown, Figure 4 This is a schematic diagram of an exemplary data card, which includes a connection module 201, a data encryption card connection module 203 and a user identity card connection module 301. The above-mentioned data encryption card connection module 203 is a data encryption card slot, and the user identity card connection module 301 is a user identity card slot. By setting the connection module 201, the data encryption card connection module 203 and the user identity card connection module 301 in the data card, it is possible to receive data transmitted from the data sending end through the connection module 201, encrypt the data through the data encryption card, and establish a communication link with the gateway through the data card based on the identity information sent by the user identity card to realize the transmission of encrypted data.

[0070] In some embodiments, as Figure 4 As shown, the data transmission circuit may further include a prompt module 401, the prompt module is electrically connected to the data transmission module 302, and the prompt module may include a prompt signal light, which is used to prompt the user data card data transmission status or communication connection status. Here, the prompt module may be connected to the data transmission module 302. Figure 3 The control chip 202 and the data transmission module 302 are electrically connected to prompt the user of the data transmission status or the communication connection status.

[0071] In some examples, the data encryption card slot and the user identification card slot may be a two-in-one card slot, and the data encryption card and the user identification card may be inserted into the data card at the same time based on the two-in-one card slot.

[0072] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0073] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0074] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or devices based on a series of steps or devices. However, this application is not limited to the order of the above steps. In other words, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0075] The present invention has been described above with reference to the flowchart and / or block diagram of the method, device (device) and computer program product according to the embodiments of the present application.It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed via the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more boxes of the flowchart and / or block diagram.Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It is also understood that each box in the block diagram and / or the flowchart and the combination of the boxes in the block diagram and / or the flowchart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0076] The above description is only a specific embodiment of the present application. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the devices, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application.

Claims

1. A circuit for transmitting data, characterized in that: include: A connection module, the connection module being detachably connected to the data sending end; a control chip, wherein a first end of the control chip is electrically connected to the connection module; a data encryption card connection module, the data encryption card connection module being electrically connected to the second end of the control chip; a communication module, the communication module being electrically connected to the control chip; The encrypted data card encrypts the data in response to receiving the data to obtain encrypted data, the encrypted data card connection module transmits the encrypted data to the control chip, the control chip transmits the encrypted data to the communication module in response to receiving the encrypted data, and the communication module sends the encrypted data to the data receiving end.

2. The data transmission circuit according to claim 1, characterized in that The communication module includes a user identity card connection module and a data transmission module; The user identification card connection module is electrically connected to a first end of the data transmission module, and a second end of the data transmission module is electrically connected to the control chip; The user identity card connection module is used for detachably connecting to a user identity card.

3. The data transmission circuit according to claim 1, characterized in that The connection module includes an interface and an interface chip. The first end of the interface is detachably connected to the data sending end, the second end of the interface is electrically connected to the first end of the interface chip, and the second end of the interface chip is electrically connected to the control chip. The interface chip is used to receive data sent by the data sending end.

4. The data transmission circuit according to claim 3, characterized in that The circuit also includes a step-down module, a first end of the step-down module is electrically connected to the second end of the interface, and a second end of the step-down module is electrically connected to the first end of the interface chip. The step-down module is used to reduce the first voltage provided by the data sending end to a second voltage.

5. The data transmission circuit according to claim 4, characterized in that The step-down module includes a first capacitor, a second capacitor and a first inductor, the first end of the first capacitor is electrically connected to the second end of the interface, the second end of the first capacitor is electrically connected to the reference voltage end, the second capacitor is connected in parallel with the first capacitor, the first end of the first inductor is electrically connected to the second end of the interface, and the second end of the first inductor is electrically connected to the first end of the interface chip.

6. The data transmission circuit according to claim 4, characterized in that The circuit further includes a voltage stabilizing module, a first end of the voltage stabilizing module is electrically connected to a second end of the voltage reducing module, and a second end of the voltage stabilizing module is electrically connected to a first end of the interface chip.

7. The data transmission circuit according to claim 1, characterized in that The circuit further includes a filter module, a first end of the filter module is electrically connected to the connection module, and a second end of the filter module is electrically connected to the control chip.

8. The data transmission circuit according to claim 1, characterized in that The control chip includes at least one data transmission pin, and the data encryption card connection module includes at least one data transmission interface, and one of the data transmission interfaces is electrically connected to one of the data transmission pins; The circuit further includes a reset module, which is electrically connected to the data transmission interface and the data transmission pin, and is used to pull the potentials of the data transmission interface and the data transmission pin to a preset potential.

9. The data transmission circuit according to claim 5, characterized in that The data encryption card connection module includes a power interface, and the power interface is electrically connected to the second end of the step-down module.

10. A system for transmitting data, characterized in that: include: An encryption memory card, a user identification card, and a data transmission circuit as claimed in any one of claims 1 to 9, wherein the data transmission circuit and the data encryption card and the user identification card are all detachably connected.

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