面向网络流媒体隐蔽通信的非均衡隐写方法研究

项目名称： 面向网络流媒体隐蔽通信的非均衡隐写方法研究

项目编号： No.61302094

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 田晖

作者单位： 华侨大学

项目金额： 25万元

中文摘要： 综合利用多个维度上（即流媒体信号和各层协议维度）的隐藏特性以实现信息隐藏是近年来网络流媒体隐蔽通信研究中提出的一种新思路，称为多维融合隐写。然而，各维度载体隐藏透明性的不均衡给多维隐藏的性能构成了极大的挑战。针对这一问题，本项目拟从"不等保护"的角度研究非均衡多维隐写技术以实现高性能隐蔽通信，主要内容包括：①准确评价并量化各维度上所有可隐藏位置的隐藏透明性，建立各维度上的分级载体特征库；②从湿度级模型和分级动态编码两个角度研究各维度上的分级隐写方法；③建立基于网络流媒体的非均衡多维隐蔽通信模型，并设计实现相应的融合策略；④建立非均衡多维融合隐蔽通信下的同步及可靠传输机制；⑤综合应用上述成果，设计并实现基于VoIP的非均衡多维融合隐蔽通信原型系统。本项目的研究成果将进一步丰富信息隐藏和隐蔽通信理论体系，为实现隐秘信息在公共网络中的安全通信提供理论依据和实践指导，具有重要的应用价值。

中文关键词： 通信信息安全；信息隐藏；隐蔽通信；非均衡隐写；网络流媒体

英文摘要： Multidimensional fusion steganography is a novel idea recently proposed for covert communications over network streaming media, which aims to achieve information hiding by comprehensively utilizing steganographic characteristics on all dimensions (including streaming media signals and network protocols). However, its performance is greatly challenged by the imbalance in steganographic transparencies of different dimensions. Therefore, in this project, we are motivated to research unequal multidimensional steganography from the view of unbalanced protection to achieve high-performance covert communications. The main research contents include: First, the steganographic transparency of each hiding position on all dimensions will be exactly evaluated and quantized, and a classified cover characteristic database for each dimension will be constructed. Second, classified steganographic methods will be researched respectively from the views of humidity degree model and graded dynamic encoding. Third, a model for unequal multidimensional fusion covert communications (UMFCC) will be constructed, and related fusion strategies will be designed. Fourth, the synchronization and reliable transmission mechanisms for UMFCC will be accordingly established. Lastly, using the above- mentioned techniques, a prototype UMFCC system b

英文关键词： Communications and Information Security；Information Hiding；Covert Communication；Unequal Steganography；Network Streaming Media