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Multiuser-based shadow watermark extraction system |
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| Authors: | Feng-Hsing Wang Lakhmi C Jain |
| Affiliation: | a School of Electrical and Information Engineering, University of South Australia, Australia b Department of Electrical and Computer Engineering, Florida International University, USA c Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Taiwan, ROC |
| Abstract: | A new watermarking scheme having the ability of sharing secret with multi-users is proposed. It splits the original watermark into two shares and embeds one share into the cover image to increase the security. A polarization procedure is performed to establish a polarity stream from the cover image. The second share and the polarity stream are used to generate a master key and several normal keys. In this system, only the super-user can reveal the genuine watermark directly. Other users possess the normal keys can obtain shadow watermarks merely. By combining the shadow watermarks together, the real watermark can be recovered. |
| Keywords: | Watermarking Visual cryptography (VC) Key design |
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