Novel chaos-based image lossless compression encryption joint algorithm

A lossless compression, image technology, used in secure communication through chaotic signals, image communication, television, etc., can solve the problems of the joint algorithm of lossless compression and encryption that are rarely studied, and the correlation between compression and encryption is not large.

Active Publication Date: 2016-06-22
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 compre...

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  • Novel chaos-based image lossless compression encryption joint algorithm
  • Novel chaos-based image lossless compression encryption joint algorithm
  • Novel chaos-based image lossless compression encryption joint algorithm

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Embodiment Construction

[0197] In order to better understand the technical solutions of the present invention, the implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0198] The first step is to build a pseudo-random sequence generator platform to prepare for the next series of encryption. Such as figure 1 As shown in (3)(4)(5)(6) modules, input the parameters of the chaotic equation, and input the initial value of the equation as the initial key, the input key should be accurate to 15 digits after the decimal point to generate a real number pseudo-random sequence, and then Quantize the pseudo-random sequence of real numbers, and the quantized value should be between 0 and 255 pixels in the grayscale image. Take the number of pseudo-random sequences according to the number of image pixels to be encrypted, and prepare the key stream for encryption.

[0199] In the second step, the image is subjected to integer wavelet trans...

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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...

Claims

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Application Information

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IPC IPC(8): H04N19/63H04L9/00H04N17/00
CPCH04L9/001H04N17/004H04N19/63
Inventor 佟晓筠张淼王翥陈鹏辉刘杨
Owner HARBIN INST OF TECH AT WEIHAI
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