窃听信道下基于双分簇技术的信源安全有损传输  

Secure Lossy Source Transmission over Wiretap Channel Based on Double Binning Technique

作　　者：徐明[1] 胡沐宇 XU Ming;HU Mu-yu(College of Information Engineering,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海海事大学信息工程学院,上海201306

出　　处：《电子学报》2022年第9期2196-2204,共9页Acta Electronica Sinica

基　　金：国家自然科学基金(No.62172269)。

摘　　要：针对图像、视频等文件在压缩传输时的可靠性和安全性问题,提出一种具有边信息和状态信息的窃听信道模型以及该模型下基于双分簇技术的信源安全有损传输方案,并利用信息理论对速率-失真-信息泄露率三元组进行可达性和逆命题证明.考虑到现实环境中的噪声因素,以高斯噪声信道为例进行具体分析,通过误差估计和微分熵定理推导出速率和失真的下界.此外,引入模糊率,将信息泄漏率转化为估计信源的最小均方误差,得出此误差的上界.仿真实验表明,所提方案在最优条件下比现有方案速率高,失真和信息泄露率小,在非最优条件下比现有方案模糊率高.Aiming at the reliability and security problem of transmitting compressed images,videos and other files,a wiretap channel model with side information and state information and a secure lossy source transmission scheme based on double binning technique under this model are proposed.Moreover,the achievability and the converse of the triple rate-dis⁃tortion-leakage are proved by the information theory.Considering the noise factors in the real environment,the Gaussian noise channel under this model is analyzed concretely as an example and the lower bounds of the rate and the distortion are derived based on the error estimation and the differential entropy theorem.In addition,the equivocation rate is introduced to transform the information leakage rate into the minimum mean square error of the estimated source and its upper bound is obtained.The simulation results show that the proposed scheme has higher rate and lower distortion and information leak⁃age rate than the existing schemes under the optimal conditions,and has higher equivocation rate than the existing schemes under the non-optimal conditions.

关 键 词：窃听信道 双分簇技术 安全有损传输 边信息 状态信息 信息泄漏 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]