计算机科学 ›› 2015, Vol. 42 ›› Issue (4): 136-140.doi: 10.11896/j.issn.1002-137X.2015.04.027
张永红
ZHANG Yong-hong
摘要: 提出一种基于有理Bézier曲面生成组合混沌映射的图像加密算法。首先通过秘钥序列生成多个Logistic混沌系统的初值,进而生成多个混沌序列;利用有理Bézier曲面将这些混沌序列生成组合混沌矩阵;其次,对原图像和组合混沌矩阵进行按位异或运算;最后,利用组合混沌矩阵生成混沌地址集合,利用混沌地址集合做置乱运算。该算法的优点是不论扩散运算还是置乱运算均采用组合混沌序列进行操作。数字实验表明,该算法加密与恢复效果良好,具有较好的安全性。
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