结合S盒与混沌映射的图像加密算法

来源 :北京邮电大学学报 | 被引量 : 0次 | 上传用户：xiaoxiaoDang

【摘要】

：

针对现有图像加密算法存在的加密质量低、明文敏感性差等问题,提出了一种结合S盒与混沌映射的图像加密算法.对明文图像的散列值进行运算,得到混沌系统的密钥,以进行置乱和扩散,S盒通过Logistic映射生成.利用二维Logistic映射和Chen混沌系统生成2个与明文图像大小相同的混沌序列,用来对图像的每个像素进行互换和一阶扩散,并利用混沌序列选择S盒元素与各像素值进行比特异或与同或运算,再对整体的各像素作二阶、三阶扩散处理.仿真测试和安全性能分析结果表明,所提算法具有良好的加密效果、鲁棒性和明文敏感性,也能较

【作者】

：

张雷陈川谭淇匀郝茂鑫杨学康

【机构】

：

齐鲁工业大学(山东省科学院) 网络空间安全学院,济南250353;齐鲁工业大学(山东省科学院) 网络空间安全学院,济南250353;齐鲁工业大学(山东省科学院) 山东省计算机网络重点实验室,济南250

【出处】

：

北京邮电大学学报

【发表日期】

：

2021年6期

【关键词】

：

图像加密算法混沌系统 S盒置乱扩散安全性分析

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结合S盒与混沌映射的图像加密算法

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