Image encryption method based on ring rotation and generalized feistel cipher structure

An image encryption method using ring rotation and a generalized Feistel cryptographic structure, employing the hyperchaotic Chen system and the one-dimensional chaotic system 1DL-SCS, solves the problems of small parameter range and low security in existing technologies, achieving a highly efficient image encryption effect.

CN116760932BActive Publication Date: 2026-09-22DALIAN MARITIME UNIVERSITY
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Patent Information

Application Number
CN202310614280.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-26
Publication Date
2026-09-22
Estimated Expiration
2043-05-26

AI Technical Summary

Technical Problem

Among existing image encryption methods, the parameter range of one-dimensional chaotic systems is small, the periodicity of Arnold mapping is strong, the applicability of Zigzag scrambling is limited, and the traditional three-term XOR diffusion has low security, making it difficult to meet the image information security needs of the big data era.

Method used

An image encryption method based on ring rotation and generalized Feistel cryptography is adopted. The chaotic sequence generated by the hyperchaotic Chen system is subjected to two ring rotations and row-by-row indexing scrambling by the one-dimensional chaotic system 1DL-SCS. Combined with the improved generalized Feistel cryptography structure for diffusion, the encryption effect is enhanced.

Benefits of technology

It achieves efficient global scrambling and diffusion, increases the chaotic state parameter space, improves the security and diffusion efficiency of image encryption, and resists various attacks.

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Abstract

The application provides an image encryption method based on ring rotation and generalized Feistel cipher structure. The method comprises the following steps: generating a chaotic sequence by a hyperchaotic Chen system, and performing ring rotation twice on a plaintext image to realize efficient global scrambling; then, a one-dimensional chaotic system 1DL-SCS is used to perform line-by-line index scrambling on the image, and then the pixel points are redistributed column by column to further break the correlation between the pixels; in the diffusion stage, the plaintext is divided into four parts, substituted into an improved generalized Feistel cipher structure for calculation, and further divided into two parts in the round function, so that the diffusion efficiency is greatly improved, and through two rounds of iteration operation, a good encryption effect can be obtained, and the security is high.
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