基于二维D-peak超混沌映射与动态DNA编码的图像加密算法研究OA

This study proposes a novel two-dimensional coupled map model,and its hyper-chaotic characteristics are verified using methods such as Lyapunov exponent spectrum,bi-furcation diagram,attractor in the phase space,sample entropy(SE),and 0-1 test.Based on this model,a pixel matrix hierarchical rotation scrambling algorithm and a dy-namic DNA encoding diffusion algorithm are proposed.The image encryption scheme is constructed via a hybrid approach incorporating two-dimensional spatial scrambling and full-bit diffusion.Through comprehensive simulation tests—including key space analysis,sensitivity testing,histogram and pixel correlation analyses,as well as cropping and noise attacks—this study demonstrates that the encryption scheme achieves a large key space,excellent key sensitivity,and strong robustness.