Multi-chaos system based method of encrypting images related to plaintext

Abstract

The invention provides a multi-chaos system based method of encrypting images related to plaintext and belongs to the field of information security. The method combining the plaintext-related scrambling technique, the multi-chaos system and a sensor model includes: scrambling plaintext images by means of the plaintext related scrambling technique based on tent chaotic mapping, subjecting the images to primary diffusion by means of chaotic piecewise linear mapping, and performing secondary diffusion by the combination of a Chen's high-dimensional hyper-chaotic system and the sensor model to finally generate ciphertext images. The algorithm structure of scrambling, diffusion and diffusion is used, relevance between the plaintext and keys is established, key space is enlarged, scrambling effect is better, diffusion degree is higher, and the ability to resist common attacks, such as exhaustive attack, statistical attach and differential attach is achieved. The method is applicable to image information processing and implementation of encryption techniques of other multimedia messages and also applicable to hardware static encryption and industrial productions, such as computer receiving or transmitting ports.

Description

technical field [0001] The invention relates to a digital image encryption method in information transmission, chaos control and synchronous design technology, and belongs to the field of information security. Background technique [0002] With the wide application of multimedia information processing technology and the rapid development of Internet and cloud computing technology, multimedia data is increasingly widely spread and stored among Internet or cloud computing nodes, and information security issues have attracted more and more attention. For multimedia data such as images and videos, due to the large amount of data of this type of information and the strong correlation between adjacent data, traditional encryption technology, as a general data encryption method, is inefficient for the encryption of image information. Low, can not meet the real-time needs. However, chaotic signals have complex characteristics such as extreme sensitivity to initial conditions, aperi...

AI Technical Summary

Problems solved by technology

[0004] Most of the chaotic image encryption techniques studied in the past are based on low-dimensional discrete chaotic maps. Although low-dimensional chaotic maps have the advantage of low computational overhead, due to their simple form, small key space, and low complexity of iteration sequences, low-dimensional cryptography System security is not high

However, although the existing image encryption technologies using high-dimensional chaotic systems have larger key spaces and more complex and unpredictable nonlinear behaviors, most of their key stream generation methods are relatively independent and have nothing to do with plaintext image information. , the generation of the ciphertext image depends solely on the key, which makes it impossible to effectively resist common attack techniques, such as differential attack techniques

At the same time, the image encryption technology using multiple chaotic systems also has the above problems to varying degrees

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