基于多维混沌组合的图像加密算法  

Image Encryption Algorithm Based on Combined Multi-Dimension Chaotic System

作　　者：张欣[1] 杨德刚[1] 

机构地区：[1]重庆师范大学数学与计算机科学学院,重庆400047

出　　处：《江西师范大学学报（自然科学版）》2010年第1期57-62,共6页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(10926170;10971240);重庆市科委自然科学基金(2008BB2366;2008BB2364);重庆市教委科技计划(KJ090803;KJ080805;KJ080806;KJ080817)资助项目

摘　　要：提出了一种基于多维混沌组合的图像加密算法.该算法引入初始置乱过程,增强了算法的安全性;并在加密过程中引入扩散机制,增强了对选择明文攻击的抵抗能力.理论分析和仿真实验表明该算法具有足够的密钥空间,可以抵御强力攻击;密文图像对初始密钥具有强敏感性;密文图像相邻像素间满足零相关性,所以该加密系统具有较高的安全性.An image encryption algorithm based on combined multi-dimension chaotic system is proposed. Initial permutation mechanism is introduced in this algorithm, which can enhance its security. In the meantime, diffusion mechanism is introduced in encryption process, this measure can enhance resistance to plain-chosen attacks. Theoretic analysis and simulations prove that this scheme has enough key space and can defend brute-force attacks. For encrypted image is high sensitive to initial key and the values of adjacent pixels satisfy zero correlation, so this encryption system is of relatively high security.

关 键 词：洛伦兹混沌系统 图像加密 猫映射 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]