Special Section on Volume Holographic Optical Elements

Optical security using a random binary phase code in volume holograms

[+] Author Affiliations
Bor Wang, Jung-Yang Chang

National Central University, Institute of Optical Sciences, Chung-Li, Taiwan

Wei-Chia Su

Tatung University, Graduate Program in Electro-Optical Engineering, Taipei, Taiwan

Ching-Cherng Sun

National Central University, Institute of Optical Sciences, Chung-Li, Taiwan

Opt. Eng. 43(9), 2048-2052 (Sep 01, 2004). doi:10.1117/1.1775235
History: Received Jan. 5, 2004; Revised May 13, 2004; Accepted May 17, 2004; Online September 09, 2004
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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 1010 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.

© 2004 Society of Photo-Optical Instrumentation Engineers

Citation

Bor Wang ; Jung-Yang Chang ; Wei-Chia Su and Ching-Cherng Sun
"Optical security using a random binary phase code in volume holograms", Opt. Eng. 43(9), 2048-2052 (Sep 01, 2004). ; http://dx.doi.org/10.1117/1.1775235


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