6533b855fe1ef96bd12b0687
RESEARCH PRODUCT
New key based on tilted lenses for optical encryption
Ignacio MorenoCarlos FerreiraVicente MicóZeev Zalevskysubject
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 Securitydescription
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 presented, considering a hybrid encryption/decryption process where the image is numerically encrypted but optically decrypted. The tilt in the lenses should be understood as a complementary key to the classical encryption/decryption process to increase the security.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-12-07 | Applied Optics |