计算机科学 ›› 2016, Vol. 43 ›› Issue (8): 100-104.doi: 10.11896/j.issn.1002-137X.2016.08.021
柴宏玉,臧鸿雁
CHAI Hong-yu and ZANG Hong-yan
摘要: 传统图像加密技术和低维混沌加密技术都有各自的局限性,而高维混沌映射比低维映射具有更复杂的动力学行为以及更好的随机性。在离散混沌广义同步定理的基础上构造了一种四维离散广义混沌同步系统,并设计了一种图像加密方案。 对加密图像进行了安全性测试,如分布直方图、相邻像素相关系数、密文信息熵、密钥敏感性、密钥空间和雪崩效应等。理论分析和数值实验表明,该加密方案的密钥空间达到10288,具有较强的抗攻击性能;对混沌系统参数及初始条件极其敏感,符合保密通信的要求。
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