Novel ultra-wide-range memristor chaotic system and multi-image deformation image encryption method
A chaotic system and multiple image technology, applied in the direction of secure communication, transmission system, and digital transmission system through chaotic signals, can solve the problems of unstable chaotic state and small range of chaotic system parameters, and achieve high universality and security , strong universality, excellent resistance to known plaintext attacks and chosen plaintext attacks
Active Publication Date: 2021-01-22
HARBIN ENG UNIV
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[0005] Aiming at the existing design defects, the present invention provides a novel ultra-wide-range memristive chaotic system and multiple image deformation image encryption method, which solves the problem that the chaotic system parameter range used in cryptography is small and the chaotic state is unstable, not only Very sensitive to subtle differences in plaintext images, and has high universality and security
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[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0039] First, S1 and S2 combine Figure 2a-Figure 2i to Figure 4a-Figure 4b The numerical equations, dynamic parameters and unique dynamic behavior of the novel memristive chaotic system in the embodiment of the present invention are described. Second, S3 binds figure 1 , Figure 5 to Figure 7a - Figure 7h The image encryption algorithm with various image deformation properties in the embodiment of the present invention is described, and its security is analyzed.
[0040] Specifically include:
[0041] S1: Using the absolute value memristor model to construct an ultra-wide range memristive chaotic system, the system can produce two kinds of two-scroll attractors and one kind of heart-shaped attractors.
[0042]
[0043] Among them, x, y, z and w are the state variables of the chaotic system, and the parameters a, b, c and d ...
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The invention provides a novel ultra-wide-range memristor chaotic system and a multi-image deformation image encryption method, and the method comprises the steps: S1, constructing the ultra-wide-range memristor chaotic system through employing an absolute value memristor model, and generating two types of two-scroll attractors and one heart-shaped attractor; S2, analyzing the dynamic behavior ofthe memristor chaotic system constructed in the step S1; S3, designing an image encryption algorithm with multiple image deformation in combination with the memristor chaotic system constructed in S1.According to the invention, the chaotic system is designed in combination with an emerging memristor, the chaotic parameter range of the obtained new system can reach (0, 107], and the stability of the chaotic state can be kept in an ultra-large range. Due to the characteristic, the system is very suitable for cryptology; the image encryption algorithm designed in the invention is highly associated with a plaintext image, and has excellent capabilities of resisting known plaintext attacks and selecting plaintext attacks; the image encryption algorithm designed in the invention can be suitablefor plaintext images of various sizes and various types, and is high in universality.
Description
technical field [0001] The invention relates to an image encryption method, in particular to a novel ultra-wide range memristive chaotic system and a multiple image deformation image encryption method, belonging to the technical field of nonlinear chaotic systems and image encryption. Background technique [0002] Thanks to the ultra-high transmission speed of modern mobile communications and the popularity of wireless networks, our daily life is surrounded by a large amount of multimedia information. However, this kind of transmission channel is open and shared, which brings about increasing information security problems, not only involving personal privacy, but also financial, medical and military aspects. In the process of people exploring how to protect information security, classic encryption algorithms such as AES and DES have been proposed. However, with the deepening of research, scholars have found that images, an information carrier with high data volume, high red...
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IPC IPC(8): H04L9/00H04L9/08
CPCH04L9/001H04L9/0861H04L9/002
Inventor 黄丽莲孙怡张泽峰刘帅李文亚
Owner HARBIN ENG UNIV