摘要
混沌动力系统具有对初值和系统参数敏感依赖性和拓扑转迁性以及混沌序列的伪随机性等优良性质,使得混沌动力系统在信息安全领域具有很好的应用价值。近年来,由于高维混沌动力系统具有比较大的密钥空间,使得高维混沌动力系统成为图像加密和隐藏的热门研究课题。文中构造了一个对称的四维混沌系统,基于该混沌系统,提出了一种数字图像隐藏方法。该方法将图像置乱技术、加密技术、分存技术、隐藏技术有机结合起来。该算法简单,安全性高,对剪切、噪声等攻击具有一定鲁棒性,也可以实现秘密图像和载体图像的无损复原。
Chaotic dynamical systems play an important role in information security thanks to their good properties such as the sensitive dependence on initial conditions and system parameters,topological transitivity,pseudo-random property,etc.In particular,high dimensional chaotic dynamical systems have attracted more attentions in recent years thanks to their higher security.One four-dimensional symmetric chaotic system is constructed in this paper;an image hiding scheme is proposed,in which the technologies of image scrambling, eneryption, sharing and hiding are applied together. The presented scheme is simple to manipulate and has high security. It is robust against some kinds of attacks and it can reconstruct the secret images and cover images in a lossless manner as well.
出处
《计算机技术与发展》
2010年第1期93-96,共4页
Computer Technology and Development
基金
国家自然科学基金资助项目(A0324649)
关键词
混沌
图像置乱
图像加密
图像分存
图像隐藏
chaos
image scrambling
image encryption
image sharing
image hiding
