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    Chapter

    Optical Image Encryption Using Optimized Keys

    We have proposed a secure optical data-storage system with a random phase key code based on a configuration of a joint transform correlator. The method to design the key code has been proposed. Computer simula...

    Takanori Nomura, Bahram Javidi in Optical and Digital Techniques for Information Security (2005)

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    Chapter

    Polarization Encoding for an Optical Security System

    A polarization-encoding system for optical security verification is proposed. The polarization information is bonded to an identification card for security verification. As the polarization state cannot be ima...

    Takanori Nomura, Bahram Javidi in Optical and Digital Techniques for Information Security (2005)

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    Chapter

    Applications of Digital Holography for Information Security

    Secure optical storage based on a configuration of a joint transform correlator (JTC) using a photorefractive material is presented. A key code designed by an optimized algorithm so that its Fourier transform ...

    Takanori Nomura, Enrique Tajahuerce… in Optical and Digital Techniques for Informa… (2005)