CN107911164A - A kind of bi-directional data safe transmission method based on visible light communication technology - Google Patents

Abstract

The invention discloses a two-way data secure transmission method based on visible light communication technology. The data is encoded by a host computer and sent through a transceiver module 1. After receiving the data, the transceiver module 2 decodes the data according to the serial port communication protocol and randomly selects the data from the local password library. Select a data to send. When the transceiver module 1 receives the password fed back by the transceiver module 2, it uses the enumeration algorithm to find out the corresponding item number of the data in the password database, and sends the feedback to the transceiver module 2. If the transceiver module 2 receives correct feedback, it will write the data into the computer, otherwise a prompt box will pop up to report a doubt. Read through the main loop multiple times in milliseconds until the end of the file is read. The invention uses simple equipment, provides a new efficient and safe method for data transmission, reduces the risk of data being stolen or tampered with, and at the same time uses LED lighting as the emission light source to save energy.

Description

A two-way data secure transmission method based on visible light communication technology

technical field

The invention relates to the technical field of visible light communication, in particular to a two-way secure data transmission method based on visible light communication technology.

Background technique

White light LED has the characteristics of energy saving, reliability, long life, low price and high-speed modulation, and can realize the dual functions of lighting and visible light communication at the same time. Visible light communication has many advantages such as safety and energy saving, avoiding electromagnetic interference, high communication rate, and precise positioning. It has broad application prospects and is a research hotspot in the field of optical communication. Since Japanese researchers proposed visible light communication in 2000, after more than ten years of development, the transmission rate has become higher and higher, and breakthroughs have been made continuously.

Visible light communication is currently playing a role in transmitting some small data and media streams with widely used lights and considerable transmission rates. Fudan University's laboratory has experimental equipment for transmitting information such as images and sounds through optical communication, but there is no instance of batch transmission of data through visible light.

At present, whether it is traditional radio frequency communication or QR code communication on the market, there are a lot of potential safety hazards. In order to solve potential safety hazards (such as sending signals maliciously, changing signals by controlling another light source to strobe, etc.), a reliable visible light two-way communication program is designed, and this program can also be used in traditional port communication. At the same time, a derivative application of this technology is used to transfer files quickly, efficiently and securely. Considering the file size limitation of the current serial port transmission software, a method of file transmission between computers is designed, which can meet the transmission requirements of files of different sizes, and at the same time can ensure that the received files are safe, and the files that users want to receive .

Contents of the invention

The purpose of the present invention is to provide a two-way secure data transmission method based on visible light communication technology. This system can be applied to many different scenarios. For example: file transfer in areas with no network and no signal;

To achieve the above object, the present invention adopts the following technical solutions:

The transceiver module 1 sends a specified amount of data, and the transceiver module 2 randomly selects a piece of data from the local cryptographic library to send after receiving the same amount of data. When the transceiver module 1 receives the password fed back by the transceiver module 2, it will automatically use the enumeration algorithm to find out the corresponding item number of the data in the password database, and send the feedback to the transceiver module 2. If the transceiver module 2 receives correct feedback, it will write the data into the computer, otherwise a prompt box will pop up to report a doubt. Read through the main loop multiple times in milliseconds until the end of the file is read.

The equipment used in the present invention is simple, easy to transform, can improve the efficiency of information dissemination and reception, and provides a new efficient and safe method for data transmission. The method saves working time and reduces the risk of data being stolen or tampered with. Light source, save energy. With a wide range of applications and high follow-up development value, visible light communication is a very popular emerging technology. With the development of visible light communication technology in the future, the algorithm used in this patent will also be extended and utilized more.

Description of drawings

Fig. 1 is a schematic diagram of the transmission method of the present invention.

Fig. 2 is a schematic diagram of the two-way communication transceiver module of the present invention.

Fig. 3 is a specific flow chart of the transmission method of the present invention.

Detailed ways

Two-way data security transmission scheme

After sending and receiving module 1 sends a signal. Transceiver module 2 accepts the signal but does not read it, randomly takes out a password from the password library, and sends it to transceiver module 1. After the transceiver module 1 receives the password, it uses the enumeration algorithm to find out the number of items corresponding to the password from the password library, and sends it to the transceiver module 2. The transceiver module 2 reads the signal when it receives the correct feedback, otherwise, a prompt box will pop up to report suspicious information.

The specific usage process is:

A. Connect transceiver module 1 and transceiver module 2 to the serial port respectively;

B. Open the ports separately;

C. Provide the data to be sent for transceiver module 1, and click send;

D. Obtain the received correct data in the transceiver module 2, or report a doubt prompt box.

Computer-to-computer file transfer scheme

Firstly, the computer user-defined file is read in the form of binary bytes, and after reading the user-specified number of bytes per millisecond (which can be processed), it is input into the computer interface (USB, serial interface, etc.) through the host computer program. The external hardware of the computer integrates binary data disassembling function and optical signal sending and receiving function. There is a buffer in the host computer program, and it regularly reads the same amount of data as the number of bytes sent per millisecond from the buffer (can be processed), and writes it to the location specified by the user. The sender's sending application and the receiver's response pass the The above-mentioned external hardware transmission.

The specific usage process is:

A. Obtain and open the serial port respectively

B. The sender clicks the "Request Data Transfer" button

C. The receiving end clicks "Allow" or "Deny", if you choose "Allow", then select the file storage location; if you choose "Deny", then initialize.

D. If the sender receives "Allow", select the file for transmission; if it receives "Reject", initialize.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the system described in the present invention The equivalent changes and modifications made in the implementation methods thereof shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (1)

1. a kind of bi-directional data safe transmission method based on visible light communication technology, the method is based on including receiving and dispatching module (1) and transmitting-receiving module (2) device realize, it is characterised in that method is as follows：

Receive and dispatch module (1) send specified amount data, transmitting-receiving module (2) receive isodose data after at random from local password storehouse One item data of middle selection is sent；When transmitting-receiving module (1) receives the password of transmitting-receiving module (2) feedback, it can automatically use and enumerate calculation Method, finds out correspondence item number of the data in cryptographic libraries, and sends a feedback to transmitting-receiving module (2)；Module (2) is received and dispatched if received Correctly feedback, then write data into computer, otherwise ejects prompting frame report and doubts.It is multiple by the major cycle in units of millisecond Perform, until reading to end-of-file.