An anti-counterfeiting two-dimensional code and its generation and identification method

Abstract

The invention discloses an anti-counterfeiting two-dimensional code and a generation and identification method thereof, and relates to the technical field of two-dimensional code anti-counterfeiting. The anti-counterfeiting two-dimensional code includes data code information for generating two-dimensional code graphics, and through chaotic encryption, the generated two-dimensional code graphics include scrambled graphics for realizing two-dimensional code anti-counterfeiting; generation method of anti-counterfeiting two-dimensional code Including the steps of setting data code information and scrambling error correction code graphics; the identification method of anti-counterfeiting two-dimensional code includes scanning the two-dimensional code graphics, obtaining encrypted data code information, and obtaining the scrambled and restored error correction code graphics through the encrypted data code information , the scrambled and restored error correction code pattern is used to identify the authenticity of the scanned two-dimensional code. The invention can scramble the graphics of a certain area in the two-dimensional code by means of chaotic encryption without changing the original information of the two-dimensional code, so as to improve the security of the anti-counterfeiting of the two-dimensional code. print and scan quality.

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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