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Optical cryptography with biometrics for multi-depth objects

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dc.contributor.authorYan, Aiminen
dc.contributor.authorWei, Yangen
dc.contributor.authorHu, Zhijuanen
dc.contributor.authorZhang, Jingtaoen
dc.contributor.authorTsang, Peter Wai Mingen
dc.contributor.authorPoon, Ting-Chungen
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2019-01-03T15:49:23Zen
dc.date.available2019-01-03T15:49:23Zen
dc.date.issued2017-10-11en
dc.description.abstractWe propose an optical cryptosystem for encrypting images of multi-depth objects based on the combination of optical heterodyne technique and fingerprint keys. Optical heterodyning requires two optical beams to be mixed. For encryption, each optical beam is modulated by an optical mask containing either the fingerprint of the person who is sending, or receiving the image. The pair of optical masks are taken as the encryption keys. Subsequently, the two beams are used to scan over a multidepth 3-D object to obtain an encrypted hologram. During the decryption process, each sectional image of the 3-D object is recovered by convolving its encrypted hologram (through numerical computation) with the encrypted hologram of a pinhole image that is positioned at the same depth as the sectional image. Our proposed method has three major advantages. First, the lost-key situation can be avoided with the use of fingerprints as the encryption keys. Second, the method can be applied to encrypt 3-D images for subsequent decrypted sectional images. Third, since optical heterodyning scanning is employed to encrypt a 3-D object, the optical system is incoherent, resulting in negligible amount of speckle noise upon decryption. To the best of our knowledge, this is the first time optical cryptography of 3-D object images has been demonstrated in an incoherent optical system with biometric keys.en
dc.description.notesThis work is partially sponsored by the National Nature Science Foundation of China under grant (No. 61575124, 11674231, 61475168).en
dc.description.sponsorshipNational Nature Science Foundation of China [61575124, 11674231, 61475168]en
dc.format.extent11en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1038/s41598-017-12946-8en
dc.identifier.issn2045-2322en
dc.identifier.other12933en
dc.identifier.pmid29021574en
dc.identifier.urihttp://hdl.handle.net/10919/86586en
dc.identifier.volume7en
dc.language.isoenen
dc.publisherSpringer Natureen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectfractional fourier domainen
dc.subjectdigital holographyen
dc.subjectencryptionen
dc.subjectinformationen
dc.subjectsecurityen
dc.subjectwatermarkingen
dc.subjectkeysen
dc.titleOptical cryptography with biometrics for multi-depth objectsen
dc.title.serialScientific Reportsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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