Anti-forgery two-dimensional code and generation and identification method thereof

Abstract

The invention discloses an anti-forgery two-dimensional code and a generation and identification method thereof, relating to the technical field of two-dimensional code anti-forgery. The anti-forgerytwo-dimensional code includes a two-dimensional code graph generated by data code information. Through chaotic encryption, the generated two-dimensional code graph includes a scrambling graph used forrealizing two-dimensional code anti-forgery. The generation method of an anti-forgery two-dimensional code includes the steps of setting data code information, scrambling an error correction code graph, etc. The identification method of an anti-forgery two-dimensional code includes the steps of scanning a two-dimensional code graph, obtaining encrypted data code information, and obtaining a scrambled and restored error correction code graph through the encrypted data code information, wherein the scrambled and restored error correction code graph is used for identifying the authenticity of the scanned two-dimensional code. Without changing original information of a two-dimensional code, the method enables a graph in a certain area of the two-dimensional code to be scrambled, thereby improving security of two-dimensional code anti-forgery. Moreover, high printing and scanning quality is not needed for code matching.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional code anti-counterfeiting, and in particular relates to an anti-counterfeiting two-dimensional code and a method for generating and identifying the same. Background technique [0002] The two-dimensional code graphs information such as numbers, symbols, and even text in specific rules according to the coding rules, and can automatically read the information through image input devices or photoelectric scanning devices. The two-dimensional code has high encoding density and large information capacity, which can accommodate up to 1850 letters or 2710 numbers or 1108 bytes or more than 500 Chinese characters, and can even encode images, audio and biological information (such as fingerprints). In addition, the two-dimensional code has strong fault tolerance, and can correctly read the two-dimensional code information of pollution, damage, and partial occlusion. Most importantly, QR codes are e...

AI Technical Summary

Problems solved by technology

[0007] The Chinese invention patent application with the publication number CN107944526A discloses an anti-tampering and anti-copying two-dimensional code anti-counterfeiting method. The ciphertext image is scrambled by encryption to generate the secondary code of the two-dimensional code. On the one hand, it cannot be decrypted without a key The ciphertext of this sub-code realizes anti-imitation. On the other hand, the distortion generated by duplicating the sub-code will exceed the set distortion threshold to realize anti-copying. Avoiding distortion during scanning also has high requirements for mobile phone quality

In addition, the use of high-precision scanners and printing presses to copy the sub-code can cause its anti-counterfeiting function to fail

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