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Chapter
Hybrid Optical Encryption of a 3D Object by Use of a Digital Holographic Technique
A hybrid optical encryption of a 3D object by using a combination of a real optical system and a virtual optical system has been proposed. The encryption was performed by a phase modulation of the object wave ...
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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...
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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...
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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 ...