Broadcast monitoring protocol based on secure watermark embedding

• A broadcast monitoring protocol based on secure watermark embedding is proposed.
• The protocol solves both customer’s right problem and unbinding problem.
• The fraudulent act between advertiser and broadcast station can be avoided.
• The techniques with part encryption can reduce computation load of multimedia.
• Bandwidth consumption can be decreased by introducing secure watermark embedding.

In broadcast monitoring applications, the broadcasting station and customers cannot know about the legal watermark information if a safe broadcast monitoring protocol is used. This ensures that a broadcasting station cannot transplant illegal watermark into illegal advertisements, as well as advertisers cannot replace legal watermarks with illegal ones. Current watermark protocols are not suitable for broadcast monitoring, because they mostly adopt homomorphic public-key cipher to guarantee the security of media contents and watermarks. This results in high computation and bandwidth consumption. This paper proposes a video protocol suited to broadcast monitoring. The proposed protocol uses secure watermark embedding based on partial encryption to improve the level of security and to help with decreasing computation and bandwidth consumption. The authors have also analyzed its effectiveness and listed barriers to its implementation.

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