A multi-key image encryption method based on five-dimensional conservative hyperchaotic system
Through a multi-key image encryption method based on a five-dimensional conservative hyperchaotic system, the multi-key sequence and chaotic sequence are generated using hash values for confusion and diffusion, the problem of single key leakage and insufficient utilization of chaotic sequences in the prior art is solved, and high-security image encryption is achieved.
CN115766962BActive Publication Date: 2025-03-21HARBIN ENG UNIV
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Patent Information
- Application Number
- CN202211275457.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-18
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2042-10-18
AI Technical Summary
Technical Problem
The existing image encryption algorithm has the problem of single keys easily leaking, and the chaotic sequence is insufficiently utilized, resulting in insufficient security.
Method used
A multi-key image encryption method based on a five-dimensional conservative hyperchaotic system is adopted to generate a multi-key sequence through hash value, and the chaotic sequence is used for chaos and diffusion to generate a ciphertext image.
Benefits of technology
The key space is expanded, the chaotic sequence is fully utilized, the security of image encryption is improved, and the known plaintext attacks are resisted.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides a multi-key image encryption method based on a five-dimensional conservative hyperchaotic system, comprising: constructing a five-dimensional conservative hyperchaotic system; generating a chaotic pseudo-random sequence for the first scrambling based on a plaintext image; scrambling the plaintext image according to the chaotic pseudo-random sequence for the first scrambling; generating a pseudo-random sequence for forward diffusion and a pseudo-random sequence for reverse diffusion based on the first scrambling graph; diffusing the first scrambled image according to the pseudo-random sequence for forward diffusion and the pseudo-random sequence for reverse diffusion; generating a chaotic pseudo-random sequence for the second scrambling based on the diffusion graph; scrambling the diffusion graph according to the chaotic pseudo-random sequence for the second scrambling to generate a ciphertext image. The present invention designs a multi-key image encryption algorithm using a wide initial value range of the system, solves the key leakage problem and the chaotic sequence utilization problem, and thus improves the security of image encryption.
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