National Changhua University of Education Institutional Repository : Item 987654321/18264
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题名: Optical Encryption and Decryption in Security-volume Holograms
作者: Su, Wei-Chia;Sun, C. C.;Yuh Ouyang
贡献者: 光電科技研究所
日期: 2003
上传时间: 2014-04-01T03:59:29Z
出版者: SPIE--The International Society for Optical Engineering
摘要: 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.
關聯: Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX, Proc. SPIE., 5206: 177-184
显示于类别:[光電科技研究所] 會議論文

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