We propose the use of fractal structured diffractive masks as keys in secure storage-readout systems. A joint transform correlator based on a photorefractive crystal in the Fourier domain is implemented to perform encryption and decryption. We discuss the advantages of encrypting information using this kind of deterministic keys in comparison to conventional random phase masks. Preliminary experimental results are presented to demonstrate the effectiveness of the proposed system.
© 2009 Optical Society of America
Diffraction and Gratings
Original Manuscript: September 8, 2008
Revised Manuscript: December 1, 2008
Manuscript Accepted: December 8, 2008
Published: January 27, 2009
Myrian Tebaldi, Walter D. Furlan, Roberto Torroba, and Néstor Bolognini, "Optical-data storage-readout technique based on fractal encrypting masks," Opt. Lett. 34, 316-318 (2009)