广播监视中的安全视频水印算法

Secure Video Watermark Algorithm in Broadcast Monitoring

分析广播监视应用中对视频片段及水印的双重认证问题,基于三维离散小波变换,提出一种高安全性的鲁棒视频水印算法。该算法生成视频哈希值,并用私钥对版权信息和哈希值进行签名,由生成的签名和哈希值构建待嵌入的水印,以实现广播监视中对视频片段及水印的双重认证。理论分析和实验结果表明,该算法对于广播监视应用具有较好的安全性和鲁棒性。

This paper analyses double authentication of a video clip and a watermark in application of broadcast monitoring. For the problem of double authentication, a secure video watermark algorithm for broadcast monitoring is proposed based on the 3D Discrete Wavelet Transform（3D-DWT）. A robust hash is computed from video clips, and video hash and copyright information are signatured by secret key. The short hash and the signature using the proposed algorithm are combined to create the watermark to be embedded, and they are used in the double authentication of video clips and the embedding watermark respectively. Analysis and experimental results show that the algorithm has good security and robustness for broadcast monitoring.