New key based on tilted lenses for optical encryption

Vicente Mico, Ignacio Moreno, Zeev Zalevsky, Carlos Ferreira

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)A115-A125
JournalApplied Optics
Volume56
Issue number1
DOIs
StatePublished - 1 Jan 2017

Bibliographical note

Publisher Copyright:
© 2016 Optical Society of America.

Fingerprint

Dive into the research topics of 'New key based on tilted lenses for optical encryption'. Together they form a unique fingerprint.

Cite this