Optical encryption and decryption in security-volume holograms

Wei-Chia Su; Ching-Cherng Sun; Yueh Ouyang

doi:10.1117/12.505556

21 October 2003 Optical encryption and decryption in security-volume holograms

Wei-Chia Su, Ching-Cherng Sun, Yueh Ouyang

Proceedings Volume 5206, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX; (2003) https://doi.org/10.1117/12.505556
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

Citation Download Citation

Wei-Chia Su, Ching-Cherng Sun, and Yueh Ouyang "Optical encryption and decryption in security-volume holograms", Proc. SPIE 5206, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX, (21 October 2003); https://doi.org/10.1117/12.505556

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