QR code encryption method based on single-intensity record phase recovery process

Abstract

The invention discloses a QR code encryption method based on a single-intensity record phase recovery process, and the method comprises the steps: encryption and decryption, and the encryption processspecifically comprises the steps: step 1, carrying out the bitwise coding of a QR code image, and obtaining a coded QR code image; step 2, taking the coded QR code image as input of a double random phase coding process, and reserving intensity information for an output result to obtain intensity distribution; step 3, scrambling the obtained intensity distribution by using chaotic mapping to obtain a ciphertext image, and completing encryption. The decryption process specifically comprises the following steps: step 4, performing inverse operation on the scrambling operation in the step 3; step5, recovering the coded QR code through a phase inversion algorithm; step 6, taking the recovered coded QR code as an input image of bit-by-bit decoding, and performing corresponding inverse operation according to the bit-by-bit coding in the encryption process to obtain a decrypted image. The method has high resistance to noise attacks and statistical analysis, and is more convenient for storage, management and transmission of ciphertext.

Description

technical field [0001] The invention belongs to the technical field of virtual optical information encryption methods, and in particular relates to a QR code encryption method based on a single-intensity recording phase recovery process. Background technique [0002] Compared with the traditional mathematical encryption technology, the image encryption technology based on virtual optics has obvious advantages. This method has the advantages of large amount of information, large key space, and strong robustness. The iterative recovery process is one of the important implementation methods in the image encryption technology based on virtual optics, especially the phase iterative recovery process and the reconstruction method of the compressed signal. The phase iterative recovery algorithm is widely used in the field of image encryption because of its good resistance to crosstalk noise. Zhao et al. proposed an image encryption algorithm using the phase iterative recovery algor...

AI Technical Summary

Problems solved by technology

Jiao, Zou and Li jointly designed a noise-free optical image encryption and decryption system, using the noise resistance of QR codes to achieve high-quality image restoration; some of the above-mentioned technologies directly encrypt and protect QR code images in two-dimensional codes. Some of them use the immunity of QR codes to noise to encrypt other images, but most of them have problems of low resistance to noise attacks, statistical analysis, etc., the key is hung up on you, and storage and transmission are inconvenient.

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