Optical security using a random binary phase code in volume holograms

Bor Wang; Jung Yang Chang; Wei-Chia Su; Ching-Cherng Sun

doi:10.1117/1.1775235

1 September 2004 Optical security using a random binary phase code in volume holograms

Bor Wang, Jung Yang Chang, Wei-Chia Su, Ching-Cherng Sun

Author Affiliations +

Optical Engineering, Vol. 43, Issue 9, (September 2004). https://doi.org/10.1117/1.1775235

Abstract

We propose a novel method for optical security by using a randomly selected binary phase code. The phase code is recorded with holographic volume gratings, and the recording material can be regarded as an optical lock, while the original phase code acts as the key. When an arbitrary phase code is used for decryption, the decryption probability is less than 10^–10 when the phase code contains only five rows. The decryption probability decreases dramatically as the row number of the code or the threshold value increases. Furthermore, the security system performs good tolerance for data loss of the key. Both the theory and experiment are demonstrated.

©(2004) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Bor Wang, Jung Yang Chang, Wei-Chia Su, and Ching-Cherng Sun "Optical security using a random binary phase code in volume holograms," Optical Engineering 43(9), (1 September 2004). https://doi.org/10.1117/1.1775235

Published: 1 September 2004

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