A Multi-Image Deformation Image Encryption Method Using Memristive Chaos System
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 small range of chaotic system parameters and unstable chaotic state, and achieve strong universality and excellent resistance Effects of known-plaintext and chosen-plaintext attacks
Active Publication Date: 2022-08-02
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 described in further detail below with reference to the accompanying drawings and specific embodiments.
[0039] First, S1 and S2 combine Figures 2a-2i to Figures 4a-4b The numerical equations, dynamic parameters and unique dynamic behaviors of the novel memristive chaotic system in the embodiments of the present invention are described. Second, S3 binding figure 1 , Figures 5 to 7a - Figure 7h Describe the image encryption algorithm with various image deformation properties in the embodiment of the present invention, and analyze its security.
[0040] Specifically include:
[0041] S1: The absolute value memristor model is used to construct an ultra-wide-range memristive chaotic system, which can generate two two-scroll attractors and one cardioid attractor.
[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 are constants in the range of real numbers. mem...
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The present invention provides a novel ultra-wide-range memristive chaotic system and a multi-image deformation image encryption method. S1: an absolute-value memristor model is used to construct an ultra-wide-range memristive chaotic system, generating two scroll attractors and a core shape attractor; S2: analyze the dynamic behavior of the memristive chaotic system constructed by S1; S3: combine the memristive chaotic system constructed by S1 to design an image encryption algorithm with multiple image deformations; the present invention combines the emerging memristive chaotic system device to design a chaotic system, the chaotic parameter range of the new system can reach (0,10 7 ], and can maintain the stability of the chaotic state in a very large range. This characteristic makes the system very suitable for use in cryptography; the image encryption algorithm designed in the present invention has a strong correlation with the plaintext image, and has excellent resistance to known plaintext attacks and selected plaintext attacks; The encryption algorithm can be applied to various sizes and types of plaintext images, and has strong 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 multi-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 communication and the popularity of wireless networks, our daily life is surrounded by a large amount of multimedia information. However, this transmission channel is open and shared, so it brings increasing information security issues, not only involving personal privacy, but also financial, medical and military aspects. In the process of people exploring how to protect information security, classical encryption algorithms such as AES and DES are proposed. However, with the deepening of research, scholars have found that images, which are information carriers with high data volume, high redundancy and high...
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IPC IPC(8): H04L9/08H04L9/28H04L9/40
CPCH04L9/001H04L9/0861H04L9/002
Inventor 黄丽莲孙怡张泽峰刘帅李文亚
Owner HARBIN ENG UNIV