Journal ArticleDOI
Encrypted optical memory system using three-dimensional keys in the Fresnel domain.
Osamu Matoba,Bahram Javidi +1 more
TLDR
Encryption and decryption of optical memory in a LiNbO(3) :Fe photorefractive crystal by use of angular multiplexing is demonstrated.Abstract:
An encrypted optical memory system using double random phase codes in the Fresnel domain is proposed. In this system, two random phase codes and their positions form three-dimensional keys for encryption of images and are used as keys to recover the original data. The third dimension is the positions of the codes, which can have as many as three degrees of freedom. Original images encrypted by use of the two phase codes located in the Fresnel domain are stored holographically in a photorefractive material. We demonstrate in preliminary experiments encryption and decryption of optical memory in a LiNbO3:Fe photorefractive crystal by use of angular multiplexing.read more
Citations
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Journal ArticleDOI
Optical encryption by double-random phase encoding in the fractional Fourier domain.
TL;DR: An optical architecture that encodes a primary image to stationary white noise by using two statistically independent random phase codes that has an enhanced security value compared with earlier methods is proposed.
Journal ArticleDOI
Double random-phase encoding in the Fresnel domain
Guohai Situ,Jingjuan Zhang +1 more
TL;DR: A lensless optical security system based on double random-phase encoding in the Fresnel domain is proposed, which can encrypt a primary image to random noise by use of two statistically independent random- phase masks in the input and transform planes, respectively.
Journal ArticleDOI
Vulnerability to chosen-cyphertext attacks of optical encryption schemes based on double random phase keys.
TL;DR: It is shown how optical encryption methods based on double random phase keys are vulnerable to an organized attack of the chosen-ciphertext type and cast doubts on the present security of these techniques.
Journal ArticleDOI
Securing information by use of digital holography.
Bahram Javidi,Takanori Nomura +1 more
TL;DR: An information security method that uses a digital holographic technique that provides secure storage and data transmission and can be electrically decrypted by use of the digital hologram of the key.
Journal ArticleDOI
Optical image compression and encryption methods
Ayman Alfalou,Christian Brosseau +1 more
TL;DR: Optical processing methodologies, based on filtering, are described that are applicable to transmission and/or data storage and the advantages and limitations of a set of optical compression and encryption methods are discussed.
References
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Journal ArticleDOI
Optical image encryption based on input plane and Fourier plane random encoding.
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
Volume Holographic Storage and Retrieval of Digital Data
TL;DR: A multiple page fully digital holographic data storage system is demonstrated, used to store and retrieve digital image and compressed video data with a photorefractive crystal.
Journal ArticleDOI
Angle-multiplexed storage of 5000 holograms in lithium niobate.
TL;DR: As many as 5000 holograms of high-resolution images have been stored within a single crystal of Fe:LiNbO3 using fracture-space multiplexing to increase the storage bandwidth.
Journal ArticleDOI
Optical pattern recognition for validation and security verification
Bahram Javidi,Joseph L. Horner +1 more
TL;DR: Computer simulation results and tests of the proposed system are provided to verify that both the phase mask and the primary pattern are separately readable and identifiable in an optical processor or correlator.
Journal ArticleDOI
Volume hologram multiplexing using a deterministic phase encoding method
TL;DR: A novel phase encoding method using deterministic orthogonal phase codes in a reference-based multiplexing technique is obtained that is able to retrieve multiple images with high diffraction efficiency without energy losses, adjustment problems or any time delay.
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Optical image encryption based on input plane and Fourier plane random encoding.
Philippe Réfrégier,Bahram Javidi +1 more