摘要
为了减轻有限精度效应对混沌特性的影响,在此提出了一种基于混沌扰动的改进算法。首先讨论量化误差对Logistic混沌特性的影响,提出基于混沌扰动的Logistic映射实现,通过混沌序列随机改变混沌映射的输出。对改进算法的分析表明,混沌序列的随机性和周期性方面比改进前有了明显的改善。最后提出基于混沌扰动的图像加密算法,仿真表明,图像的保密性能大大增强。
In order to alleviate the effects of finite precision on chaotic system, chaotic sequence disturbing arithmetic is brought out. After analyzing the characteristics of quantization error on Logistic chaotic sequence,chaotic sequence disturbing arithmetic on Logistic chaotic sequence is researched in which the output of Logistic chaotic sequence is changed by chaotic sequence. The simulation result shows that the perturbing scheme is effective in sequence randomness and periodic aspect. Then image encryption based on chaotic sequence disturbing is proposed and the analysis shows the image encryption algorithm has a good effect.
出处
《现代电子技术》
2009年第24期127-130,共4页
Modern Electronics Technique
基金
江苏省高校自然科学基础研究资助项目(KJD510150)
