基于覆盖码的多媒体传感网数据隐写算法  

Improved Steganography Algorithm for Multimedia Sensor Network via Coverings

作　　者：尤星[1,2] 孙启[1,2] 刘建坡[2] 童官军[2] 袁晓兵[2] 

机构地区：[1]中国科学院大学计算机与通信学院,北京100049 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《数据采集与处理》2015年第2期408-416,共9页Journal of Data Acquisition and Processing

基　　金：国防重点实验室基金(9140C180101120C18076)资助项目

摘　　要：在多媒体传感网中进行视频信息隐藏有很多局限性。为了增强在多媒体传感网中进行隐秘通信的安全性,本文从提高隐写效率和降低节点能耗入手,在分析研究以往相近研究的基础上,提出了一种新的视频信息隐藏算法。算法结合了H.264/AVC(Advanced video codec)标准视频流的数据特性,提出了调整覆盖码矩阵简化计算复杂度的新思想和避免误差漂移的隐写策略。算法运用了新的分类编码方法;对于不同类型的数据特征,引进并设计了针对多媒体传感网应用限制条件的覆盖编码方法。实验证明:该算法能够降低嵌入误差,有效抵抗统计分析;减少了数据通信冗余,同时计算复杂度由传统的幂次复杂度降低到线性复杂度。There are lots of constrains for video steganography in sensor networks.Based on the analysis of previous similar researches,a novel video steganography algorithm is proposed to improve steganography efficiency and reduce energy consumptions.Considering the characteristics of H.264/AVC video stream in multimedia sensor network,this algorithm promotes a novel classification strategy having the advantages of error drift prevention and covering code adjustment with simplified calculation complexity.Furthermore,for different types of data features,we introduce and design a covering coding method satisfied the application limited conditions of multimedia sensor networks.Both data analysis and experimental results show that the proposed algorithm is robust against statistical analysis attacks and it also minimizes embedding error.With less communicating redundancy,the algorithm doubles embedding efficiency and decreases computation complexity from exponential to linear.

关 键 词：多媒体传感网 视频隐写 帧内预测 覆盖码 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]