Color Image Compression Encryption Method Based on Compressed Sensing and Double Random Encryption Mechanism

Abstract

The invention provides a color image compression and encryption method based on compressed sensing and double random encryption mechanism. This method first decomposes the plaintext image into three components R, G and B, and then DWT transforms them respectively, and then uses the index vector D 1 , D 2 , D 3 , D 4 Perform double random position scrambling on the sparse coefficient matrix, then perform compression measurement and quantization on the scrambled matrix, and perform simultaneous double random pixel value diffusion between and within the R, G, and B components of the quantized matrix, and finally obtain ciphertext image. The parameters and initial values ​​of the four-wing hyperchaotic system and the Logistic-Tent chaotic system are generated by using the plaintext image information and external key, and then the parameters and initial values ​​are brought into the Logistic-Tent chaotic system to generate the chaotic sequence to construct the measurement matrix; The parameters and initial values ​​are brought into the four-wing hyperchaotic system, and the generated four chaotic sequences are sorted to obtain four index vectors, which are respectively used in double random position scrambling and diffusion.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to a color image compression encryption method based on compressed sensing and double random encryption mechanisms. Background technique [0002] With the rapid development of network technology and communication technology, digital images are widely used in military, medical, commercial and many other fields. Image information often contains privacy or confidentiality. Once leaked, it will have a serious impact on the country, society, and individuals, and even threaten national security, social stability, and personal life. Therefore, it is particularly important to protect the data security of images in transmission and storage. , Encrypting data is an effective technical means. Traditional encryption methods such as Data Encryption Standard (DES) or Advanced Encryption Standard (AES) are mainly designed for text information. Different from text data, images have some ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor scrambling effect and low randomness of the diffusion method existing in existing encryption methods, the present invention provides a color image compression encryption method based on compressed sensing and double random encryption mechanism

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