Optical security by use of a randomly selected binary phase code

Bor Wang; Ching-Cherng Sun; Wei-Chia Su

doi:10.1117/12.363964

1 October 1999 Optical security by use of a randomly selected binary phase code

Bor Wang, Ching-Cherng Sun, Wei-Chia Su

Proceedings Volume 3804, Algorithms, Devices, and Systems for Optical Information Processing III; (1999) https://doi.org/10.1117/12.363964
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

An optical security system using a random selected binary phase code is proposed. A random binary phase encoded light is incident on a holographic recording material and writes gratings in the material with a reference plane wave. The recording material can be regarded as an optical lock while the phase code acts as the key. As the pixel number is 5 X 20, the decryption probability is less than 10^-10 when arbitrary phase code is used for decryption. The decryption probability decreases dramatically as the pixel number increases. Furthermore, the security system performs good tolerance to data loss of the phase code.

Citation Download Citation

Bor Wang, Ching-Cherng Sun, and Wei-Chia Su "Optical security by use of a randomly selected binary phase code", Proc. SPIE 3804, Algorithms, Devices, and Systems for Optical Information Processing III, (1 October 1999); https://doi.org/10.1117/12.363964

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