摘要
对多媒体视频图像信息传输安全性问题的研究,能够有效保护视频图像信息。对视频图像信息传输安全性的研究,需要对图像进行高效加密,利用密钥流机制量化新序列。传统方法改变视频图像加密控制参数,将图像块进行扩散处理,但忽略了利用密钥流机制量化新序列,导致图像加密精度偏低。提出基于双向扩散机制融合时间延迟的多媒体视频图像高效加密算法。上述图像感兴趣区域原理,定义视频图像显著像素选取机制,将多媒体视频图像像素划分为显著像素和次要像素,构成显著像素矩阵,将时间延迟引入到多媒体视频图像显著像素超混沌序列中,采用位置集合置乱算法对该序列所得显著像素位置集合图像重新设置,利用密钥流机制量化新序列,通过双向扩散机制加密视频图像,实现加密视频图像实时传输。实验结果表明,所提算法加密机制较为安全,密钥空间较大。
An efficient encryption algorithm for multimedia video image of fusion time delay is put forward based on bidirectional diffusion mechanism. Firstly, according to principle of interest image region, the selection mecha- nism of remarkable pixel of video image is defined and the pixels of multimedia video image are divided into signifi- cant pixels and secondary pixels, then significant pixel matrix is formed and time delay is introduced into hyper chaot- ic sequence of remarkable pixel of multimedia video image, and then assemblage image of significant pixel position is reset from this sequence by using scrambling algorithm of location assemblage and new sequence is quantified via uti- lizing key stream mechanism. Finally, the real time transmission of encrypted video image is achieved by encrypting video image of bidirectional diffusion mechanism. Simulation results show that the algorithm has secure encryption mechanism and large key space.
作者
赖益强
LAI Yi-qiang(South China Business College, Guangdong University of Foreign Studies, Guangzhou Guangdong 510545, China)
出处
《计算机仿真》
北大核心
2017年第11期168-171,219,共5页
Computer Simulation
基金
超声速飞行器气动光学效应红外图像复原理论与方法(61175120)
广东省青年创新人才项目(2015KQNCX199)
关键词
多媒体
视频图像
传输安全性
Multimedia
Video image
Transmission security
