Image encryption based on four-dimensional multi-parameter robust chaotic system and dynamic spiral block transformation

作者：Jianhong Xiang, Shubei Liang, Liangang Qi, Zhong Yu · 发表于：Physica Scripta · 年份：2025 · DOI：10.1088/1402-4896/adbc29 · 被引用次数：10 · 研究领域：Chaos-based Image/Signal Encryption

Abstract At present, image encryption methods generally suffer from the problems of insufficient randomness and weak attack resistance, particularly as traditional encryption methods often employ fixed image scrambling methods, making the encryption results easy to predict. To address this issue, this paper proposes an image encryption algorithm based on a four-dimensional multi-parameter robust chaotic system and dynamic spiral block transformation. First, a four-dimensional multi-parameter robust chaotic (4D-MPRC) system is proposed, which cross-couples the low-dimensional chaos into a high-dimensional chaotic system and incorporates multi-parameter control to better regulate chaotic behavior and ensure the stability of the system dynamics. Next, a dynamic spiral block transformation is proposed for image scrambling. The starting point and direction of scrambling are dynamically selected based on the chaotic system, which breaks the limitation of fixed image scrambling methods in the traditional image scrambling method, and makes the image scrambling more complex and difficult to decipher in the reverse direction. Finally, an image encryption model consisting of chaotic system, dynamic spiral block scrambling and DNA diffusion is constructed by combining DNA coding. The experimental results show that the proposed encryption model effectively improves the security and anti-attack capability of image encryption.