A Hybrid- Watermarking Scheme for Asymmetric and Symmetric Watermark Extraction

In this paper, a hybrid-watermarking scheme is proposed that enables both asymmetric and symmetric watermark extraction by embedding public and private watermarks, respectively. Using the asymmetric extraction, anyone with the public-watermark key can extract the public watermark to verify some information, for example, the identity of the actual seller, etc. If the public watermark is destroyed by some attack, the symmetric watermark extraction allows the actual seller to extract the hidden private watermark to prove his ownership claim. We present experimental results to show the effectiveness of our proposed scheme