Journal ArticleDOI
Encrypting three-dimensional information with digital holography
Enrique Tajahuerce,Bahram Javidi +1 more
TLDR
A method for optical encryption of three-dimensional (3D) information by use of digital holography using a phase-shifting interferometer and an intensity-recording device.Abstract:
A method for optical encryption of three-dimensional (3D) information by use of digital holography is presented. A phase-shifting interferometer records the phase and amplitude information generated by a 3D object at a plane located in the Fresnel diffraction region with an intensity-recording device. Encryption is performed optically by use of the Fresnel diffraction pattern of a random phase code. Images of the 3D object with different perspectives and focused at different planes can be generated digital or optically after decryption with the proper key. Experimental results are presented.read more
Citations
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Journal ArticleDOI
Multichanneled puzzle-like encryption
TL;DR: A multichanneled puzzle-like encryption method that relies on the input information decomposition, in the same way as the pieces of a puzzle, to increase data security transmission.
Dissertation
From Dataveillance to Data Economy: Firm View on Data Protection
TL;DR: The findings from the analysis of survey data show that big data and data protection support each other, but also that some frictions can emerge around data collection and data fusion.
Journal ArticleDOI
Three-dimensional image authentication scheme using sparse phase information in double random phase encoded integral imaging.
TL;DR: It is demonstrated that 3D images from integral imaging can be authenticated at different depths using a nonlinear correlation method and can provide enhanced information security because the decrypted 2D elemental images from the sparse phase cannot be easily observed by the naked eye.
Journal ArticleDOI
Double-random-phase encryption with photon counting for image authentication using only the amplitude of the encrypted image.
TL;DR: A photon-counting double-random-phase encryption technique that only requires the photon-limited amplitude of the encrypted image for decryption, which is able to decrypt the image and nonlinear correlation algorithms can be used to authenticate the decrypted image.
Journal ArticleDOI
Optical triple random phase encryption
TL;DR: Compared with conventional DRPE, the proposed TRPE method can provide an effective alternative and has enhanced security features against the aforementioned attacks.
References
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Journal ArticleDOI
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J.W. Cooley,John W. Tukey +1 more
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Journal ArticleDOI
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Philippe Réfrégier,Bahram Javidi +1 more
TL;DR: A new optical encoding method of images for security applications is proposed and it is shown that the encoding converts the input signal to stationary white noise and that the reconstruction method is robust.
Journal ArticleDOI
Phase-shifting digital holography
Ichirou Yamaguchi,Tong Zhang +1 more
TL;DR: A new method is proposed in which the distribution of complex amplitude at a plane is measured by phase-shifting interferometry and then Fresnel transformed by a digital computer, which can reconstruct an arbitrary cross section of a three-dimensional object with higher image quality and a wider viewing angle than from conventional digital holography using an off-axis configuration.
Journal ArticleDOI
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Ulf Schnars,W. Jüptner +1 more
TL;DR: The principle of recording holograms directly on a CCD target is described and a real image of the object is reconstructed from the digitally sampled hologram by means of numerical methods.
Journal Article
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