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• W2082204039 abstract "A multiple image cryptosystem based on different apertures in an optical set-up under a holographic arrangement is proposed. The system is a security architecture that uses different pupil aperture mask in the encoding lens to encrypt different images. Based on this approach multiple encryption is achieved by changing the pupil aperture arrangement of the optical system among exposures. In addition to the classical speckle phase mask, the geometrical parameters characterizing the apertures are introduced to increase the system security. Even when an illegal user steals the speckle phase mask, the system cannot be broken into without the correct pupil geometrical parameters. The experimental set-up is based on a volume photorefractive BSO crystal as storing device. Information retrieval is done via a phase conjugation operation. We also have to stress that the multiple storage under this scheme, is only possible with the help of the aperture mask. Simulation and experimental results are further introduced to verify the proposed method." @default.
• W2082204039 created "2016-06-24" @default.
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• W2082204039 date "2006-05-01" @default.
• W2082204039 modified "2023-10-09" @default.
• W2082204039 title "Multiple image encryption using an aperture-modulated optical system" @default.
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• W2082204039 doi "https://doi.org/10.1016/j.optcom.2005.11.055" @default.
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