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Proceedings Paper

Optical encryption and decryption in security-volume holograms
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Paper Abstract

An optical security holographic memory encrypted by a random phase key and decrypted by a holographic key (a holographic optical element; HOE) is presented and demonstrated. The security hologram is based on protecting the access to the memory from the unauthorized users by encoding the reference waves. The holographic decryption key is fabricated by storing the wavefront information of the set of reference beams. Each addressed reference beam is stored in the HOE through holographic multiplexing technique. The decryption process is achieved by using the reconstruction reference beam to access the secure data. This security hologram system is suitable for practical application since the decryption key can be controlled copied. As to our best knowledge, this is the first experimental impementation to replace a random phase mask key.

Paper Details

Date Published: 21 October 2003
PDF: 8 pages
Proc. SPIE 5206, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX, (21 October 2003); doi: 10.1117/12.505556
Show Author Affiliations
Wei-Chia Su, Tatung Univ. (Taiwan)
Ching-Cherng Sun, National Central Univ. (Taiwan)
Yueh Ouyang, Chinese Military Academy (Taiwan)


Published in SPIE Proceedings Vol. 5206:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX
Francis T. S. Yu; Ruyan Guo; Shizhuo Yin, Editor(s)

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