一种基于混沌映射的图像加密方案

Wei Zhang, Zhi-liang Zhu, Hai Yu
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引用次数: 10

摘要

近年来,人们对基于混沌映射的经典加密体系——“混沌扩散”进行了研究。其中,二维Cat map通常在混淆阶段使用,因为图像可以看作是一个二维数组,同时Cat map的飞行是明显的,即它的键空间不够大。在该加密方案中,混沌阶段的Cat映射不是固定控制参数,而是可变控制参数,以扩大加密方案的密钥空间。仿真结果表明,该密码系统具有较高的安全性和运行效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An Image Encryption Scheme Based on Chaotic Maps
In recent years, the classic encryption architecture based on chaotic map—“confusion diffusion” has been investigated. Among them, a two dimension Cat map is usually employed in confusion phase as an image can be seen as a two dimension array, meanwhile the flew of Cat map is obvious, that is the key space of it is not large enough. In the proposed encryption scheme, the Cat map is not with the fixed control parameters but a variable one during the confusion phase to enlarge the key space of the encryption scheme. Simulations are carried out with detail analyses, demonstrating the high security and efficient operation of our cryptosystem.
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