【摘要】 利用低维混沌序列加密数字图像的安全性不高。耦合单峰映象格子(CML)这一时空混沌系统具有较高的时间和空间复杂度。在分析CML 系统缺点的基础上,利用改进算法生成的混沌二值序列具有良好的随机性能。该序列在数字图像加密实验中取得了良好的效果,既提高了加密的质量又降低了算法的复杂度。最后文章还分析了 CML 时空序列在实时多媒体保密通信中的应用前景。更多还原

【Abstract】 The security when low-dimensional chaotic sequences are applied in digital image encryption is lower.In this paper,researches show that CML spatiotemporal chaotic systems have higher temporal and spatial complexity.Meanwhile,based on analysis of the shortcoming of CML system,using improved algorithm,chaotic binary sequences with better randomicity are obtained.Then the binary sequences are applied in digital image encryption experiments and get good results.It both improves eneryption quality and reduces computational complexity.The last part of this paper analyzes the application foreground of CML spatiotemporal sequences in real-time multimedia secure communication.更多还原