Optical Cryptography and Watermarking Using Some Fractional Canonical Transforms, and Structured Masks

  • A. K. Yadav
  • Sunanda Vashisth
  • Hukum Singh
  • Kehar Singh
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 166)


We have carried out a few studies on image encryption and watermarking in various transform domains, for amplitude and phase images. We have used structured phase masks (SPM) based on devil’s vortex Fresnel lens (DVFL) to enhance security by increasing the key-space. The proposed schemes have been validated by computer simulations and their efficacy is evaluated by computing mean-squared-error (MSE) between the original image and the decrypted image. They have been examined for their sensitivity to various encryption parameters, and robustness to noise and occlusion attacks.


Watermark Image Image Encryption Watermark Scheme Host Image Encrypt Image 
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 India 2015

Authors and Affiliations

  • A. K. Yadav
    • 1
  • Sunanda Vashisth
    • 1
  • Hukum Singh
    • 1
  • Kehar Singh
    • 1
  1. 1.Department of Applied SciencesITM UniversityGurgaonIndia

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