Search results for "Optical encryption"

showing 4 items of 4 documents

Encriptación óptica empleando llaves Weierstrass-Mandelbrot

2013

[EN] This paper presents the generation of encryption keys using the local oscillating properties of the partial sums of Weierstrass-Mandelbrot fractal function. In this way, the security key can be replicated if the parameters used to obtain it are known. Therefore, these parameters can be sent instead of sending the key. This procedure reduces the amount of information to be sent and prevents possible interception of the key. Moreover, the key can not be affected by data loss or pollution. The effectiveness of the Weierstrass-Mandelbrot keys were demonstrated by computer simulation in a 4f optical encryption system and the double random phase encoding technique. These keys allow us to enc…

Computer scienceCiencias FísicasÓptica y FotónicaData securityLlaveData lossEncryptionComputer securitycomputer.software_genrelcsh:Education (General)Doble máscaraDouble-masked//purl.org/becyt/ford/1 [https]FractalEncoding (memory)Encriptación ópticaOptical cryptographyCiencias ExactasÓpticaclaves o llavesbusiness.industryFunction (mathematics)//purl.org/becyt/ford/1.3 [https]encriptaciónOptical encryptionoptical cryptography fractal key double-maskedFractal keybusinesslcsh:L7-991FractalAlgorithmcomputerCIENCIAS NATURALES Y EXACTAScriptografíaencriptación óptica fractal llave doble máscara
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Optical security and encryption with totally incoherent light

2001

We present a method for securing and encrypting information optically by use of totally incoherent illumination. Encryption is performed with a multichannel optical processor working under natural (both temporal and spatially incoherent) light. In this way, the information that is to be secured can be codified by use of color signals and self-luminous displays. The encryption key is a phase-only mask, providing high security from counterfeiting. Output encrypted information is recorded as an intensity image that can be easily stored and transmitted optically or electrically. Decryption or authentication can also be performed optically or digitally. Experimental results are presented.

AuthenticationHigh securitybusiness.industryComputer scienceMultispectral imageComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONOptical securityEncryptionAtomic and Molecular Physics and OpticsOptical encryptionDiffractive lensOpticsComputer Science::MultimediabusinessOptical processorComputer Science::DatabasesComputer Science::Cryptography and SecurityOptics Letters
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Multiplexing of encrypted data using fractal masks

2012

In this Letter, we present to the best of our knowledge a new all-optical technique for multiple-image encryption and multiplexing, based on fractal encrypting masks. The optical architecture is a joint transform correlator. The multiplexed encrypted data are stored in a photorefractive crystal. The fractal parameters of the key can be easily tuned to lead to a multiplexing operation without cross talk effects. Experimental results that support the potential of the method are presented.

ImaginationImage EncryptionSystemComputer sciencemedia_common.quotation_subjectComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONTransformPhysics::OpticsStorageEncryptionMultiplexingCrosstalkSearch engineOpticsFractalElectronic engineeringDomainComputer Science::Information TheoryComputer Science::Cryptography and Securitymedia_commonbusiness.industryAtomic and Molecular Physics and OpticsOptical encryptionFISICA APLICADAPhotorefractive crystalOptical EncryptionbusinessTelecommunications
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New key based on tilted lenses for optical encryption

2016

A novel concept based on tilted spherical lenses for optical encryption using Lohmann’s type I systems is presented. The tilt angle of the spherical lenses is used as an encrypted key and the decryption performance is studied both qualitatively (visual image degradation) and quantitatively (mean squared error analysis) by numerical simulations. The paper presents a general mathematical framework in virtue of the dioptric power matrix formalism and oblique central refraction used in the optometry field. Computer simulations show that image information cannot be retrieved after a few degrees of tilt on both spherical lenses in the encryption system. In addition, a preliminary experiment is pr…

Computer sciencebusiness.industryMaterials Science (miscellaneous)ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONEncryption01 natural sciencesGeneralLiterature_MISCELLANEOUSIndustrial and Manufacturing EngineeringOptical encryption010309 optics03 medical and health sciences0302 clinical medicineOpticsComputer Science::Multimedia0103 physical sciences030221 ophthalmology & optometryHybrid cryptosystemBusiness and International ManagementbusinessComputingMethodologies_COMPUTERGRAPHICSComputer Science::Cryptography and SecurityApplied Optics
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