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中文摘要：
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．
英文摘要：
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.
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