抗共谋攻击的同步运动补偿扩频隐写视频水印  

Synchronous motion compensation spread spectrum steganography videowatermarking against collusion attacks

作　　者：王岩[1,2] Wang Yan(Shanghai Institute of Smart Manufacturing,Shanghai Jiao Tong University,Shanghai 201306,China;Shanghai Joy Real Information Technology Co.,Ltd.,Shanghai 201112,China)

机构地区：[1]上海交通大学上海智能制造研究院,上海201306 [2]上海军睿信息技术有限公司,上海201112

出　　处：《计算机应用研究》2022年第6期1838-1844,共7页Application Research of Computers

基　　金：上海市软件和集成电路产业发展专项资金资助项目。

摘　　要：针对视频水印无法抵抗帧间共谋而导致版权问题,提出一种同步运动补偿和扩频隐写相结合的视频水印来抵抗共谋攻击。首先构建共谋模型、模拟攻击原理和分析噪声来源确定两类共谋场景的混合抵抗策略及评判要求;其次分别利用同步运动补偿和扩频隐写应对两类共谋攻击;最后通过测试验证混合抵抗策略满足抗共谋攻击的评判要求,确保共谋者无法利用数据冗余获取有效的共谋规则并实施攻击。结果证明:均值矢量补偿(ACV)从算法时效性和运动一致性角度较对比方法亚像素精度运动补偿和可变分块运动补偿更适用于第一类共谋场景;对第二类共谋场景施加帧平均、帧切除,首末帧峰值信噪比(PSNR)平均降幅20.91%,帧重构、帧裁剪PSNR极值间平均波幅2.76%,明显优于对比方法平均降幅的41.76%和28.54%、平均波幅的13.91%和7.72%。综上所述,该方法满足共谋攻击的评判要求,起到了抵抗帧间共谋攻击的效果。This paper proposed a video watermark combining synchronous motion compensation and spread spectrum stegano-graphy to solve the copyright problem caused by the inability of video watermarking to resist collusion between frames.Firstly,it constructed the hybrid resistance strategy and judgment requirements for two types of collusion scenarios based on collusion model,attack principles and noise sources.Secondly,it utilized synchronous motion compensation algorithms and spread spectrum steganography to deal with the two types of collusion attacks.Finally,the test verified that the hybrid resistance strategy could satisfy the judgment requirements of the anti-collusion attack to ensure that the conspirators could not use data redundancy to obtain effective collusion rules and carry out attacks.The results show that from the perspective of algorithm timeliness and motion consistency,AVC is more suitable for the first type of collusion scene than the contrast method SPMC and VBMC.In the second type of collusion scene,frame average and frame cut’s first and last frame PSNR average reduction is 20.91%,frame reconstruction and frame cropping’s PSNR average amplitude between extremes is 2.76%,significantly better than the average reduction of 41.76%and 28.54%,the average amplitude 13.91%and 7.72%of the comparison methods.In summary,the proposed method satisfies the evaluation requirements of collusion attacks and has the effect of resisting collusion attacks between frames.

关 键 词：帧间共谋攻击 同步运动补偿 扩频隐写 一阶马尔可夫链 双模混合噪声 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]