双混沌映射的图像加密技术  

Image encryption technology based on dual chaotic maps

作　　者：林克正[1] 钟媛[1] 

机构地区：[1]哈尔滨理工大学计算机科学与技术学院,哈尔滨150080

出　　处：《计算机工程与应用》2010年第36期195-197,209,共4页Computer Engineering and Applications

基　　金：黑龙江省教育厅科学技术研究项目(No.11551087)

摘　　要：为了提高图像加密算法的安全性和高效性,提出了一种分段Logistic混沌映射与Cat映射相结合的双混沌系统。首先由改进后的Logistic映射确定选用哪种映射进行迭代,从而确定混沌密钥,最后对算法的安全性进行分析。实验结果表明,该算法的密钥空间较大,并具有较高的初值敏感性和抗攻击能力,是一种新的有效的图像加密算法。In order to improve the security and efficiency of image encryption algorithm,a dual chaotic system combining piecewise Logistic chaotic map and Cat map is proposed.Firstly,choose a chaotic map from piecewise Logistic chaotic map and Cat map after doing an improved Logistic map,and then confirm the chaotic key.Lastt,he security analysis is performed at the dual chaotic maps.The experimental result shows that the algorithm has numerous key space,higher sensitivity to ini-tial value and stranger resistant attack ability.It is a novel efficient image encryption algorithm.

关 键 词：图像加密 混沌 LOGISTIC映射 CAT映射 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]