Holographic implementation of a two-level authorization protocol using hidden images in a photorefractive crystal

Authors

  • Raphael A. Guerrero ⋅ PH National Institute of Physics, University of the Philippines Diliman and Department of Physics, Ateneo de Manila University
  • Loujie Senatin ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

An optical system for two-level verification of identity is presented. Photorefractive holography is used to hide an image as a secondary security precaution. Experimental results display true concealment and robustness against unauthorized access.

SPP 2003 Proceedings Cover

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Published

2003-10-22

Issue

2003: Proceedings of the 21st Samahang Pisika ng Pilipinas Physics Congress

Section

Poster Session PB

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How to Cite

[1]
“Holographic implementation of a two-level authorization protocol using hidden images in a photorefractive crystal”, Proc. SPP, vol. 21, no. 1, p. SPP-2003-PB-16, Oct. 2003, Accessed: Apr. 30, 2026. [Online]. Available: https://proceedings.spp-online.org/article/view/SPP-2003-PB-16