基于直方图平移的视频密文域大容量可逆信息隐藏  

High-capacity reversible data hiding in encrypted videos based on histogram shifting

作　　者：陈培 张帅伟[3] 林洋平 钮可[1,2] 杨晓元[1,2] CHEN Pei;ZHANG Shuaiwei;LIN Yangping;NIU Ke;YANG Xiaoyuan(Key Laboratory of Network&Information Security Under the PAP(Engineering University of PAP),Xi’an Shaanxi 710086,China;College of Cryptographic Engineering,Engineering University of PAP,Xi’an Shaanxi 710086,China;Institute of Equipment and Technology,Academy of PAP,Beijing 100012,China)

机构地区：[1]网络与信息安全武警部队重点实验室(武警工程大学),西安710086 [2]武警工程大学密码工程学院,西安710086 [3]武警部队研究院装备技术研究所,北京100012

出　　处：《计算机应用》2022年第11期3633-3638,共6页journal of Computer Applications

基　　金：国家自然科学基金资助项目(61872384)。

摘　　要：针对视频密文域可逆信息隐藏(RDH)嵌入容量不高的问题,提出一种基于直方图平移的视频密文域大容量可逆信息隐藏方案。首先,利用流密码算法对4×4亮度帧内预测模式和运动矢量差值(MVD)的符号位进行加密,形成视频密文域;其次,构造MVD的二维直方图,设计关于(0,0)对称的直方图平移算法;最后,在MVD密文域中进行直方图平移,实现可分离的视频密文域可逆信息隐藏。实验结果表明,与对比方案相比,所提方案的嵌入容量平均提升263.3%,加密视频的平均峰值信噪比(PSNR)最高不超过15.956 dB,含密的解密视频的平均PSNR均能达到30 dB以上。所提方案可以有效提升嵌入容量,适用于更多类型的视频序列。Aiming at the low embedding capacity of Reversible Data Hiding(RDH)in encrypted videos,a highcapacity RDH scheme in encrypted videos based on histogram shifting was proposed.Firstly,4×4 luminance intra-prediction mode and the sign bits of Motion Vector Difference(MVD)were encrypted by stream cipher,and then a two-dimensional histogram of MVD was constructed,and(0,0)symmetric histogram shifting algorithm was designed.Finally,(0,0)symmetric histogram shifting algorithm was carried out in the encrypted MVD domain to realize separable RDH in encrypted videos.Experimental results show that the embedding capacity of the proposed scheme is increased by 263.3%on average compared with the comparison schemes,the average Peak Signal-to-Noise Ratio(PSNR)of encrypted video is less than 15.956 dB,and the average PSNR of decrypted video with secret can reach more than 30 dB.The proposed scheme effectively improves the embedding capacity and is suitable for more types of video sequences.

关 键 词：可逆信息隐藏 视频加密 直方图平移 大容量 运动矢量差值 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]