Novel chaos-based image lossless compression encryption joint algorithm

Abstract

The invention discloses an image lossless compression encryption joint algorithm based on multiple kinds of chaos, which belongs to the technical field of multimedia information safety. In view of high safety requirements of the image lossless compression algorithm SPIHT, an image lossless compression encryption joint algorithm based on multiple kinds of chaos is designed. The algorithm is designed to generate an encryption pseudo random sequence which is safer and is not easy to be broken, a wavelet transform coefficient matrix is encrypted in a mode of design local diffusion and overall scrambling, and during an SPIHT coding process, and multiple turns of encryption are carried out on a sorting scanning part. Theoretical analysis and experimental results show that the algorithm of the invention has the advantages that the encryption speed is quick; the safety is high; influences on a compression ratio are few; an image file can be kept to be lossless; and the application prospect and the practical value are wide.

Description

technical field [0001] The invention belongs to the technical field of multimedia information security, and in particular relates to a chaos-based image lossless compression encryption joint algorithm. Background technique [0002] With the development and popularization of network technology, the amount of network information is increasing exponentially. Faced with the storage of a huge number of image files, image compression has become an essential solution. However, in some fields, such as medical, aerospace, national security departments, etc., it is still hoped that the image can be restored without loss after compression, so there is no 1 Lossy compression is very important. After the popularity of the Internet, network security issues have become very serious, and malicious programs such as viruses, worms, and Trojan horses have taken the opportunity to flood [1] , in order to ensure the security of the image transmission and storage process, it is a relatively sa...

AI Technical Summary

Problems solved by technology

However, in most image compression and encryption joint algorithms, few studies have been made on image lossless compression and encryption joint algorithms, Yang Huaqian, Liao Xiaofeng [2] Although the SPIHT-based image compression algorithm is used, it is a lossy compression algorithm, which selectively encrypts wavelet coefficients. The encryption process does not participate in the SPIHT encoding process, making compression and encryption less relevant.

Images