title: Optical-data storage-readout technique based on fractal encrypting masks.
abstract: 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.
authors.affiliation: Centre de Investigaciones Opticas, CONICET-CIC, La Plata, Argentina.
authors.forename: Myrian
authors.initials: M
authors.lastname: Tebaldi
authors.forename: Walter D
authors.initials: WD
authors.lastname: Furlan
authors.forename: Roberto
authors.initials: R
authors.lastname: Torroba
authors.forename: Néstor
authors.initials: N
authors.lastname: Bolognini