基于低有效位数值排序的密文域可逆信息隐藏  

An Efficient Reversible Data Hiding in Encryption Domain Based on Lower-significant-bit Value Ordering

作　　者：孔咏骏 张敏情[2] 涂广升 彭菓玉 KONG Yong-jun;ZHANG Min-qing;TU Guang-sheng;PENG Guo-yu(College of Password Engineering,Engineering University of the Chinese Armed Police Force,Xi'an 710086,China;Key Laboratory of Network and Information Security under the Armed Police Force,Engineering University of the Chinese Armed Police Force,Xi'an 710086,China)

机构地区：[1]武警工程大学密码工程学院,西安710086 [2]武警工程大学网络与信息安全武警部队重点实验室,西安710086

出　　处：《科学技术与工程》2019年第33期279-289,共11页Science Technology and Engineering

基　　金：国家自然科学基金(61872384)资助

摘　　要：提出了一种基于低有效位数值排序的密文域可逆信息隐藏方法。该方法首先对像素信息进行位平面划分,然后对非重叠像素块的低有效位进行数值排序实现秘密信息的可逆嵌入,同时利用排序结果提取排序特征。整个加密过程中对不同位平面采用不同的加密机制,对低有效位进行Josephus映射加密,将映射对应的低有效位排序特征作为混沌序列控制变量再对高有效位进行logistic加密。利用低有效位像素值排序,不仅能够实现信息提取与图像恢复的可分离操作,而且可以驱动排序特征控制整个高有效位加密过程,从而提高图像加密的安全性。A reversible data hiding method in encryption domain based on lower-bit pixel value ordering was proposes.Firstly,the pixel information was divided by bit planes.Then,the low-significant-bits of non-overlapping pixel blocks were sorted by pixel value to realize the reversible embedding of secret information.During the whole encryption process,different encryption mechanisms were used for different bit planes.The low-significant-bits are encrypted by Josephus mapping,and the ranking features of the low-significant-bits corresponding to the mapping were taken as the control variables of the chaotic sequence.The high-significant-bits were encrypted by logistic method finally.Using low-significant-bit pixel value sorting method can not only realize the separation of information extraction and image restoration,but also drive sorting features to control the whole high-significant-bit encryption process,thereby improving the security of image encryption.

关 键 词：密文域可逆信息隐藏 像素值排序 Josephus遍历映射 Logistic混沌加密 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]