CN204442397U - A kind of encrypted electronic signature device - Google Patents

Abstract

The utility model provides a kind of encrypted electronic signature device, relates to electronic technology field.This device comprises writing pen and encrypted electronic signature screen, encrypted electronic signature screen comprises for being connected with outer computer, to access the interface module of the usb signal of computer export, be connected with interface module, for usb signal being converted to the control board of LVDS signal, be connected with control board, for carrying out screen display to LVDS signal and receive the touch-screen of handwriting information of writing pen input under screen display interface, and be connected with touch-screen, be encrypted for the information of identifying the handwriting and the handwriting information after encryption is converted to the encrypting module of usb signal, the output of encrypting module is connected with interface module.The utility model can ensure the fail safe of handwriting information in transmitting procedure, the serious economic loss that the handwriting information avoiding user to input is stolen by lawless person and caused in the process of transmission.

Description

An encrypted electronic signature device

technical field

The utility model belongs to the field of electronic technology, in particular to an encrypted electronic signature device.

Background technique

With the development of science and technology, electronic signatures have been widely used in finance, mobile business and paperless office systems. At present, various electronic signature devices appear on the market, and these devices use the USB (Universal Serial Bus) interface to communicate with the computer. Specifically, the electronic signature device collects the handwriting input by the user in real time. Then upload the handwriting information input by the user to the computer through the USB interface, and the computer receives the handwriting information and draws a handwritten signature image in the electronic document. However, there are security risks in the above-mentioned communication method used between the electronic signature device and the computer. Since the electronic signature also has legal effects, if it is stolen by criminals during the communication between the electronic signature device and the computer, it will be given to the user. cause serious economic losses.

Utility model content

The purpose of this utility model embodiment is to provide an encrypted electronic signature device, which aims to solve the potential safety hazards in the communication mode adopted between the electronic signature device and the computer. If the electronic signature is stolen by criminals during the communication process, it will give The problem of causing serious economic losses to users.

The embodiment of the utility model is achieved in this way. An encrypted electronic signature device includes a stylus and an encrypted electronic signature screen, and the encrypted electronic signature screen includes a USB signal for connecting to an external computer to access the output of the computer. Interface module, connected with the interface module, used to convert the USB signal into a control board of LVDS signal, connected with the control board, used for screen display of the LVDS signal and receiving handwriting under the screen display interface The touch screen of the handwriting information input by the pen, and the encryption module connected with the touch screen for encrypting the handwriting information and converting the encrypted handwriting information into USB signals, the output terminal of the encryption module is connected to the interface The modules are connected.

In the encrypted electronic signature device described in the embodiment of the present invention, the encryption module is one of AES encryption module, DES encryption module, 3DES encryption module or domestic password encryption module.

In the encrypted electronic signature device described in the embodiment of the present invention, the computer is provided with a decryption module corresponding to the encryption module.

In the encrypted electronic signature device described in the embodiment of the present utility model, the interface module includes a USB master port for connecting to an external computer, and a first USB slave port and a second USB slave port connected to the USB master port , the first USB slave port is connected to the control board, and the second USB slave port is connected to the encryption module.

In the encrypted electronic signature device described in the embodiment of the present invention, the control board includes a USB interface connected to the first USB slave port, and a USB interface connected to the USB interface for outputting the USB interface. The signal is converted into an FPGA protocol data conversion unit of LVDS, and an LVDS interface connected with the FPGA protocol data conversion unit, and the LVDS interface is connected with the touch screen.

In the encrypted electronic signature device described in the embodiment of the present invention, the touch screen is a capacitive electromagnetic touch screen, and the stylus is an electromagnetic pen.

In the encrypted electronic signature device described in the embodiment of the present invention, the electromagnetic pen is an active electromagnetic pen or a passive electromagnetic pen.

Implementing the encrypted electronic signature device provided by the embodiment of the utility model has the following beneficial effects:

The encryption module used in the encrypted electronic signature device provided by the embodiment of the utility model can use AES, DES, 3DES or national secret algorithm to encrypt the handwriting information input by the stylus, and use the encrypted handwriting information to communicate with the external computer through the interface module. Communication, which can ensure the security of handwriting information in the transmission process and avoid serious economic losses caused by criminals stealing user's handwriting information during transmission.

Description of drawings

Fig. 1 is a structural block diagram of an encrypted electronic signature device provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Fig. 1 is a structural block diagram of an encrypted electronic signature device provided by an embodiment of the present invention. Referring to Fig. 1, the encrypted electronic device provided by the embodiment of the utility model includes a stylus 1 and an encrypted electronic signature screen 2, and the encrypted electronic signature screen 2 includes a screen for connecting with an external computer 3 to access the computer 3 The interface module 21 of the USB signal of output, is connected with described interface module 21, is used for converting described USB signal into the control panel 22 of LVDS (Low Voltage Differential Signaling, low voltage differential signal) signal, is connected with described control panel 22 , a touch screen 23 for displaying the LVDS signal on the screen and receiving the handwriting information input by the stylus 1 under the screen display interface, and being connected to the touch screen 23 for encrypting the handwriting information and encrypting the handwriting information The handwriting information is converted into an encryption module 24 of a USB signal, and the output end of the encryption module 24 is connected with the interface module 21. It should be understood that in actual implementation, the interface module 21 in this embodiment is also used to obtain a power supply voltage of 5V from the external computer 3 so as to supply power to other modules in the encrypted electronic signature device.

In this embodiment, the encryption module 24 is an AES (Advanced Encryption Standard, advanced encryption standard) encryption module 24, DES (Data Encryption Standard, data encryption standard) encryption module 24, 3DES (Triple Data Encryption Standard, triple data encryption Standard) encryption module 24 or a kind of in domestic password encryption module 24. The computer 3 is provided with a decryption module corresponding to the encryption module 24 . Encryption module 24 in this embodiment can adopt AES, DES, 3DES or national secret algorithm to encrypt the handwriting information input by handwriting pen, and adopt the handwriting information after encrypting to communicate with external computer through interface module, even if data is transmitted In the process of being stolen, it cannot be cracked, thus ensuring the security of the handwriting information in the transmission process and avoiding serious economic losses caused by the user's handwriting information being stolen by criminals during the transmission process.

In this embodiment, the interface module 21 includes a USB host port 211 for connecting to the external computer 3 and a first USB slave port 212 and a second USB slave port 213 connected to the USB host port 211, the The first USB slave port 212 is connected to the control board 22 , and the second USB slave port 213 is connected to the encryption module 24 .

In this embodiment, the control board 22 includes a USB interface 221 connected to the first USB slave port 212, connected to the USB interface 221, and used to convert the USB signal output by the USB interface 221 into LVDS The FPGA (Field Programmable Gate Array, Field Programmable Logic Gate Array) protocol data conversion unit 222, and the LVDS interface 223 connected with the FPGA protocol data conversion unit 222, the LVDS interface 223 is connected with the touch screen 23.

In this embodiment, the touch screen 23 is a capacitive electromagnetic touch screen, and the stylus 1 is an electromagnetic pen. It should be understood that, in actual implementation, the touch screen 23 may also be a resistive touch screen 23 or a capacitive touch screen 23, and the corresponding stylus 1 may also be a resistive pen or a capacitive pen. However, since electromagnetic touch has the advantages of high light transmittance, high resolution, and sensitive response, therefore, in this embodiment, a capacitive electromagnetic touch screen and an electromagnetic pen are used. It has high input precision. Optionally, the electromagnetic pen described in this embodiment is an active electromagnetic pen or a passive electromagnetic pen.

The working principle of the utility model embodiment is set forth in detail below in conjunction with Fig. 1:

When it is necessary to use an electronic signature, use a USB data cable to connect the USB main port 211 in the encrypted electronic signature device with the USB interface of the external computer 3, and the computer 3 will provide the device with an electric voltage through the USB port, and the computer 3 will The screen display signal of itself is converted into a USB signal and transmitted to the USB host port 211 in the device through the USB data line, and the USB host port 211 receives the USB signal and transmits the USB signal to the control board 22 through the first USB slave port 212, The FPGA protocol data conversion unit 222 in the control board 22 converts the USB signal into an LVDS signal and outputs it to the touch screen 23, and the touch screen 23 displays the LVDS signal on the screen, and receives the electronic signature input by the electromagnetic pen under the screen display interface. Handwriting information, and the handwriting information is transmitted to the encryption module 24, the encryption module 24 receives the handwriting information, and adopts AES, DES, 3DES or national secret algorithm to encrypt the handwriting information input by the electromagnetic pen, and then encrypts the handwriting information after encryption It is converted into a USB signal and sent to the second USB slave port 213, and the second USB slave port 213 receives the USB signal, and returns the USB signal to the computer 3 through the USB master port 211 and the USB data line, and the computer 3 receives the USB signal, and The encrypted handwriting information contained in the USB signal is decrypted by using the pre-agreed secret key, and then the handwriting information input by the user is restored, thus completing the function of the electronic signature.

To sum up, the encryption module 24 used in the encrypted electronic signature device provided by the embodiment of the utility model can use AES, DES, 3DES or national secret algorithm to encrypt the handwriting information input by the stylus 1, and use the encrypted handwriting information to pass through the interface The module 21 communicates with the external computer 3, which can ensure the security of the handwriting information in the transmission process and avoid serious economic losses caused by illegal elements stealing the user's handwriting information during the transmission process.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. an encrypted electronic signature device, it is characterized in that, comprise writing pen and encrypted electronic signature screen, described encrypted electronic signature screen comprises for being connected with outer computer, to access the interface module of the usb signal of described computer export, be connected with described interface module, for described usb signal being converted to the control board of LVDS signal, be connected with described control board, for carrying out screen display to described LVDS signal and receive the touch-screen of handwriting information of described writing pen input under screen display interface, and be connected with described touch-screen, for being encrypted described handwriting information and the handwriting information after encryption being converted to the encrypting module of usb signal, the output of described encrypting module is connected with described interface module.

2. encrypted electronic signature device as claimed in claim 1, it is characterized in that, described encrypting module is the one in AES encryption module, des encryption module, 3DES encrypting module or domestic cryptographic module.

3. encrypted electronic signature device as claimed in claim 2, is characterized in that, be provided with the deciphering module corresponding with described encrypting module in described computer.

4. encrypted electronic signature device as claimed in claim 3, it is characterized in that, described interface module comprises the USB master port for being connected with outer computer and the USB that is connected with described USB master port from port and the 2nd USB from port, a described USB is connected from port with described control board, and described 2nd USB is connected from port with described encrypting module.

5. encrypted electronic signature device as claimed in claim 4, it is characterized in that, described control board comprises the USB interface be connected from port with a described USB, be connected, be converted to for the usb signal described USB interface exported the FPGA protocol data converting unit of LVDS with described USB interface, and the LVDS interface to be connected with described FPGA protocol data converting unit, described LVDS interface is connected with described touch-screen.

6. encrypted electronic signature device as claimed in claim 5, is characterized in that, described touch-screen is electric capacity electromagnetic touch screen, and described writing pen is time writer.

7. encrypted electronic signature device as claimed in claim 6, it is characterized in that, described time writer is active electrical magnetic pen or passive electrical magnetic pen.