CN106301775A - A kind of QR code encryption method based on RSA Algorithm - Google Patents

Abstract

The invention discloses a kind of QR code encryption method based on RSA Algorithm.Needing encryption for important information and encrypted content safety is high and the demand such as easy decoding, the present invention uses RSA Algorithm to combine with QR coding and decoding technology.User can use different encryption levels to be encrypted information according to demand.RSA Algorithm is a kind of asymmetrical AES, it is ensured that encryption and decryption key efficiently separates, it is ensured that the safety of encryption.The present invention can be used for the every field such as review of important certificate certificate false proof, bill anti-counterfeit and article, meets the demand of different field user profile encryption.

Description

A QR code encryption method based on RSA algorithm

【Technical field】

The invention mainly relates to the technology fusion based on the RSA algorithm and the QR code, and belongs to the technical field of encrypted identification of the QR code. The invention can be applied to various fields such as anti-counterfeiting of important certificates and certificates, bills, item traceability, logistics, etc., and has a very wide application prospect.

【Background technique】

With the rapid development of science and technology, smart mobile terminals have been widely used, smart phones are more and more widely used, and QR codes based on Android system and WeChat technology are also widely used. A smartphone can be used not only as an information interaction device, but also as a QR code recognition device. QR codes have been widely used in people's daily life and become a quick tool for people to obtain information. Users can obtain hidden information by scanning a specific QR code with a smartphone. Because the QR code has the advantages of large amount of stored data, strong error correction function and easy identification, and the smart phone terminal can be used as a QR code identification device, it also greatly promotes the development of the QR code. Therefore, QR codes are widely used in various fields such as finance, logistics, and transportation.

For a long time, counterfeit and shoddy goods have endangered the vital interests of enterprises and consumers, and seriously affected the country's economic development. In order to better adapt to the rapid development of the economy and society, better solve the security, reliability and traceability of information dissemination in enterprises and institutions, and further improve the security and standardization of information management, at the same time, due to the fact that most enterprises In the process of circulation, it is necessary to trace and anti-counterfeit the goods. Countries and enterprises spend a lot of manpower and financial resources on anti-counterfeiting and anti-counterfeiting every year. However, due to the lack of anti-counterfeiting technology and single anti-counterfeiting methods, ordinary consumers lack anti-counterfeiting tools and other factors, the anti-counterfeiting effect is not ideal. The appearance of QR two-dimensional code just makes up for this shortcoming. It has multiple anti-counterfeiting features, so it has strong security and anti-counterfeiting performance.

A QR code encryption method based on RSA algorithm The anti-counterfeit traceability system adopts the RSA algorithm to encrypt the QR code technology to mark the product, print or label the two-dimensional code on the product packaging, and the user only needs to use the designated two-dimensional code mobile phone software By decoding and checking, you can verify the authenticity of the product and obtain detailed information. The two-dimensional code can store a wealth of product information, and it is not easy to be copied and stolen through encryption. The product information comes from the official release of the company, and the query channels are formal and professional, which realizes the high efficiency of product information anti-counterfeiting.

The vigorous development of Internet of Things technology provides a broader management platform for enterprise product quality anti-counterfeiting and traceability management. Users can scan the QR code to identify and trace product information with their smartphones, and with the help of the QR code anti-counterfeiting application based on the Internet of Things, technically cut off the circulation channel of fake goods. It will become a powerful "weapon" to combat counterfeit and shoddy products and trace the flow of problematic products.

Currently, there is no such high-security RSA-encrypted QR code recognition system. Therefore, the present invention mainly proposes an improvement scheme and a recognition method for the QR code recognition system for the above problems.

【Content of invention】

The invention mainly aims at the user's need to encrypt the content of the QR code and requires a very high confidentiality effect, and proposes an identification system and an identification method based on the QR code encryption method based on the RSA algorithm.

A recognition system based on an RSA algorithm-based QR code encryption method mainly includes three parts: a QR code image generated by encrypting plaintext information, a QR code image acquisition device, and an Android system-based RSA encrypted QR code client decryption and recognition. The encryption part of the plaintext information mainly uses the private key to encrypt the plaintext information to generate a QR code image, and hardware equipment for QR code image acquisition, including PCB boards, lenses, holders and color filters, DSP (for CCD), sensors, etc. components. The image is collected through the lens, and the generated optical image is projected onto the sensor, and then the optical image is converted into an electrical signal, and the electrical signal is converted into a digital signal through analog-to-digital conversion. The digital signal is processed by DSP and then sent to the mobile phone processor. It is processed in the computer, and finally converted into the image seen on the display of the mobile device, the collected image is preprocessed, and the effective information in the collected QR image is obtained by using the decryption algorithm. , the client decryption and identification part of the RSA encrypted QR code based on the Android system is mainly to use the public key to decrypt and identify the information collected by the camera of the smartphone and display it to the user.

A method for generating a QR code image by using the RSA algorithm to encrypt plaintext information, as shown in flowchart 1.

The client uses the smartphone based on the Android system to identify the RSA encrypted QR code image module part: it is responsible for identifying the overall RSA encrypted QR code. Preprocessing, after preprocessing, the decoding information is obtained by decoding the QR code. When the decoding information of the QR code is obtained, the recognition module of the RSA encrypted QR code determines that the QR code is in the encrypted mode according to the predetermined rules. If it is determined to be in the encrypted mode , then the decoded information is handed over to the RSA encrypted QR code recognition module for processing, and the overall decryption is performed to obtain the plaintext information.

[Advantages and positive effects of the present invention]

Compared with prior art, the present invention has following advantage and positive effect:

By using the RSA encrypted QR code technology, it can meet the user's extremely high requirements for confidential content, and the encryption is safe and reliable. In addition, the user does not need additional hardware identification equipment, and the user only needs to use a smartphone installed with a dedicated scanning client to scan the RSA encrypted QR code image to intelligently identify the coded information. The implementation cost is low, and there is no need to purchase special hardware scanning equipment.

【Description of drawings】

FIG. 1 is a flow chart of a method for encrypting and decrypting a QR code based on the RSA algorithm.

【detailed description】

In order to express the embodiments, significance and advantages of the present invention more clearly, the present invention will be described in more detail below in conjunction with the accompanying drawings.

The invention designs an identification system based on a QR code encryption method based on the RSA algorithm, which mainly includes two parts: a QR code image acquisition device and an Android system-based RSA decryption QR code client decryption and identification part. The image acquisition of the QR code uses the hardware component device based on the camera of the Android smart phone. The decryption and recognition part of the client side of the RSA encrypted QR code based on the Android system is mainly to use the public key to decrypt and identify the information collected by the camera of the smart phone and display it to the user. user.

Fig. 1 has shown the principle block diagram of a kind of QR code encryption method based on RSA algorithm of the present invention.

As shown in Figure 1, the present invention proposes a QR code encryption method based on the RSA algorithm. The user obtains plaintext information as needed, and if an encryption mode is selected, the information is encrypted using a private key to obtain ciphertext information. The ciphertext information will be obtained to generate a QR image, and the encryption of the information will be completed and the corresponding QR code will be generated.

As shown in Figure 1, the present invention processes the encrypted QR code as follows:

Firstly, the QR code image is preprocessed, and then the QR code is decoded to obtain the decoding information. When the QR code decoding information is obtained, the identification module of the RSA encrypted QR code determines whether the QR code is an encrypted mode according to the predetermined rules. If it is determined to be the overall encryption mode, the decoded information will be processed by the RSA encrypted QR code recognition module for overall decryption, thereby obtaining plaintext information.

1. Acquisition and acquisition of QR code images through the hardware composition of the camera of the Android mobile phone, that is, the QR code image acquisition device;

2. After obtaining the QR code image, it needs to go through image preprocessing, mainly including: grayscale, median filter and binarization, and then the positioning of the QR code image, edge extraction, correction of the QR code image, etc.;

3. After preprocessing, the decoding information is obtained by decoding the QR code;

4. When the QR code decoding information is obtained, the identification module of the RSA encrypted QR code will judge whether the QR code adopts the encryption mode according to the predetermined rules. If it is determined to be the overall encryption mode, the decoding information will be identified by the RSA encrypted QR code The module processes and performs overall decryption to obtain plaintext information; if it is determined that the QR code is in non-encrypted mode, the decoded information will be processed by the non-encrypted QR code recognition module to obtain plaintext information.

Claims (4)

1. A QR code encryption method based on the RSA algorithm, characterized in that the plaintext information is preprocessed using the RSA algorithm to generate primary ciphertext information. According to the size of the primary ciphertext and the requirements of the error correction level, the appropriate QR version is selected for the final encryption of the primary ciphertext to obtain an easily identifiable QR image. Use proprietary decryption software to scan the encrypted image, and the decrypted information will be obtained. 2. According to claim 1, the present invention is a QR code encryption method based on the RSA algorithm, and the software is only a special APP decryption software for downloading and installing. Its main feature is that the large prime number pair obtained by the RSA algorithm is used as the encrypted public key and private key, and the decryption method is to use the public key to decrypt the ciphertext image generated by the private key to obtain plaintext information. 3. According to claim 1, the hardware device for image acquisition of QR codes is characterized in that the image acquisition passes through the front end of the acquisition lens, and the generated optical image is projected onto the sensor, and then the optical image is converted into an electrical signal. The signal is converted into a digital signal through analog-to-digital conversion, the digital signal is processed by DSP, and then sent to the processor for processing. Get scan information. 4. According to claim 1, the present invention adopts asymmetric encryption to carry out primary encryption to information, and its feature is mainly to utilize the generated private key to perform encryption processing to generate the primary ciphertext, and utilize the public key to decrypt the final ciphertext , to get plaintext information.