基于LSB的数字图像分存隐藏算法  

Hiding algorithm of digital image sharing based on LSB

作　　者：王继军[1,2] 张显全[2] 韦月琼[2] 

机构地区：[1]广西财经学院计算机与信息管理系,广西南宁530003 [2]广西师范大学计算机科学与信息工程学院,广西桂林541004

出　　处：《计算机工程与设计》2008年第23期6167-6170,共4页Computer Engineering and Design

基　　金：广西自然科学基金项目(0447035);广西研究生教育创新计划基金项目(2006106020812M37);广西教育厅基金项目(200607MS135)。

摘　　要：提出一种数字图像分存方法,首先将秘密信息转为一维序列,利用混沌和密码学原理,实现位置和像素值的双置乱;然后把置乱后的序列分成几段,分别嵌入大小适合的载体图像中,实现了秘密信息的分存。隐藏算法能在确保最多只修改一位的前提下,在同一个字节中嵌入两位秘密信息,增大了嵌入量;置乱和分存方案使秘密信息变的更分散,增强了隐蔽性,减小了攻击者的怀疑。整个算法实现简单,运算量小,数据膨胀率低,安全性高,并可实现无损还原,实验也验证了算法的有效性。A new method of digital image sharing is presented. Firstly, the secret information is turned into the unidimensional sequence, and then the sequence＇ s value and position is scrambled using double random number and cryptology principle. Secondly, divide the scrambling sequence into several sections, and camouflage them into sizable carrier image to re^tlize the secret information sharing. This algorithm combines the encryption technique, scrambling technique, information hiding and sharing technique, but with much simpler algorithm, less computation time, smaller pixel expansion, better recovery effect and more difficultly for the attacker to decode. The results show that the algorithm has application value in the field of secret image storage and transmission.

关 键 词：信息隐藏 LSB 数字图像置乱 数字图像分存 信息安全 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]