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Multiple Watermarking in Visual Cryptography

  • Hao Luo
  • Zhe-Ming Lu
  • Jeng-Shyang Pan
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5041)

Abstract

This paper proposes a scheme to hide two watermarks in visual secret sharing of a gray level image. One watermark is embedded during secret image halftoning, and the other is hidden during the halftone image encryption. A non-expansion visual secret sharing model is used to encrypt the halftone image. In watermark extraction, only Exclusive-OR operation is needed, and basic properties of conventional visual cryptography technique are still preserved. Experimental results show the effectiveness of our schemes.

Keywords

Image Encryption Secret Image Pseudo Random Number Generator Watermark Embedding Decryption Strategy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Hao Luo
    • 1
  • Zhe-Ming Lu
    • 2
  • Jeng-Shyang Pan
    • 3
  1. 1.Harbin Institute of TechnologyHarbinP.R. China
  2. 2.Sun Yat-sen UniversityGuangzhouP.R. China
  3. 3.Kaohsiung University of Applied SciencesKaohsiungTaiwan

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