一种基于加密域可逆水印的H.265视频认证加密方案  

An authenticated encryption scheme for H. 265 video based on reversible watermarking in encrypted domain

作　　者：项煜东 吴桂兴[2] 

机构地区：[1]中国科学技术大学软件学院,安徽合肥230051 [2]中国科学技术大学苏州研究院,江苏苏州215123

出　　处：《微型机与应用》2017年第14期4-7,13,共5页Microcomputer & Its Applications

基　　金：江苏省自然科学基金-面上研究项目(BK20141209);苏州市应用基础研究项目(SYG201543)

摘　　要：轻量级视频加密技术和近年来兴起的加密域可逆水印技术为视频的认证加密提供了新的技术支撑,但现有的加密域可逆水印技术大多数局限于静态图像,而视频的认证加密不能直接使用传统静态图像的数字水印方案。在此背景下,提出一种加密域可逆数字水印方案,并利用它实现视频的认证加密。该方案基于H.265/HEVC视频编码标准,通过在DCT域对变换系数进行操作,能够把加密和可逆水印嵌入进行分离,进而可以实现在已经加密的视频中可逆地嵌入消息认证码(Message Authentication Code,MAC),最终同时实现内容安全性保护与完整性认证。实验表明该方案不仅能在加密的视频中嵌入可逆水印,还能对视频的篡改进行定位。Lightweight video encryption and the emerging encryption domain reversible watermarking technologies are the new tools which can be used for the authenticated encryption of video stream. The methods of reversible watermarking for images in encrypted domain, which are mostly explored, can＇t be used for video because of the complexity of video compression. In this paper, we proposed a reversible watermarking scheme in the encrypted domain and implemented an authenticated encryption system. This scheme, based on the H. 265/HEVC video coding standard, separates the reversible watermarking embedding from the encrypting process in the DCT domain so that the Message Authentication Code （MAC） can be embedded into the encrypted video stream. Thereby, the content security and the content authentication can be achieved simultaneously. Experiments show that the proposed method can be adopted to reversibly embed watermark into encrypted video and locate the data tampering.

关 键 词：视频加密 数字水印 HEVC 认证加密 

分 类 号：TN919.81[电子电信—通信与信息系统]