吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (5): 1653-1660.doi: 10.13229/j.cnki.jdxbgxb201705043
梁士利1, 柴宗谦1, 张玲2, 吴颜生1, 曹春雷1
LIANG Shi-li1, CHAI Zong-qian1, ZHANG Ling2, WU Yan-sheng1, CAO Chun-lei1
摘要: 提出了一种基于二维二态五邻居可逆细胞自动机(CA)的图像加密算法。本方法首先对X型结构类型的 CA进行了分析测试,提出了具有明显密钥混淆效应的偏X2型结构CA;其次在进行CA每次迭代加密时,对迭代结果进行矩阵转置运算处理;随后采用具有混沌行为的9d62(hex)规则一维四邻居CA产生密钥图像;最后算法在CA边界条件中插入密钥信息,并参与细胞自动机加密迭代。实验结果表明,采用基于偏X2型CA结构和新型密钥设计,相比于传统的密钥与尾数据做单一异或的运算方法,提高了密钥在整个加密体系的参与度和敏感性,降低了CA迭代次数,明文扩散率提高了36.14%。
中图分类号:
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