基于Logistic序列的数字图像加密技术研究

Research on the Digital Image Encryption Technology Based on the Logistic Sequence

Logistic映射是一个离散动力学系统,具有简单的数学模型,对其产生的混沌序列进行变换就很容易得到混沌数字序列,对初值和结构参数的改变具有极端的敏感性,并且产生的混沌序列具有类白噪声统计特性等特点.本文基于以上特性提出了新的基于Logistic序列的数字图像加密技术.仿真实验结果证明该算法实现简单,计算量小且有效可行,具有较好的安全性.

Logistic mapping is a discrete dynamics system,and it has simple mathematic model. It is easy to obtain the chaotic sequence of numbers by transforming its chaotic sequence produced by logistic mapping. Logistic mapping is extremely sensitive to the change of its initial value and dimensions. Besides, the chaotic sequence of the numbers produced has the character of off--white noise statistics. Based on the above characteristics we put forward an new digital image encryption technology based on Logistic sequence. The simulation results show that the algorithm is simple, practical, secure and consumes less calculation time.