摘要
本文提出了一种新的基于混沌系统的数字图像置乱算法,并将其应用于图像加密。该算法用Logistic映射产生的混沌序列值,离散化后构造出对换规则矩阵和横向、纵向移动量矩阵,通过遍历图像中的每个像素点,根据规则和图像中的另一像素点进行对换置乱。实验结果分析表明,该算法具有很好的置乱效果,有较好的加密效率和安全性。
A new digital image scrambling algorithm based on chaotic system is presented in this paper for image encryption. The chaotic sequence generated by Logistic-ma Pis discretized to generate the matrixes which control the rules of exchange and the displacement distance both in horizontal and vertical direction. By traversing each pixel in image, each pixel is exchanged with another pixel in the image following the rules. Simulation experimental result shows that this algorithm has good scrambling performance, high efficiency and security.
出处
《计算机科学》
CSCD
北大核心
2008年第8期238-240,共3页
Computer Science
基金
国家自然科学基金(60703035)
重庆市自然科学基金(2006BB2227)
关键词
混沌
图像置乱
图像加密
Chaotic, Image scrambling, Image encryption
