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Optical Engineering

Optical security using a random binary phase code in volume holograms
Author(s): Bor Wang; Jung Yang Chang; Wei-Chia Su; Ching-Cherng Sun
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Paper 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.

Paper Details

Date Published: 1 September 2004
PDF: 5 pages
Opt. Eng. 43(9) doi: 10.1117/1.1775235
Published in: Optical Engineering Volume 43, Issue 9
Show Author Affiliations
Bor Wang, National Central Univ. (Taiwan)
Jung Yang Chang, National Central Univ. (Taiwan)
Wei-Chia Su, Tatung Univ. (Taiwan)
Ching-Cherng Sun, National Central Univ. (Taiwan)


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