EXPERIMENTAL OPTICAL ENCRYPTION SYSTEM BASED ON A SINGLE LENS IMAGING ARCHITECTURE COMBINED WITH A PHASE RETIEVAL ALGORITHM

F. MOSSO; N. BOLOGNINI ; D. G. PEREZ

JOURNAL OF OPTICS. A, PURE AND APPLIED OPTICS (PRINT)

IOP PUBLISHING LTD

Lugar: Londres; Año: 2015 vol. 17 p. 65702 - 65711

1464-4258

We propose, andexperimentally demonstrate, a single-lens imaging system as a compact encodingarchitecture by using a hybrid protocol for data processing. The encryptionprocess consists of coherent light illuminating a random phase mask attached toan input image (the data), then the outgoing complex field propagates untilreaching a second random phase mask next to a lens: encrypted data is obtainedat some output plane after the lens. We demonstrate the feasibility of thisproposal, and highlight the advantages of using tridimensional speckle as asecure random carrier instead of a standard ciphertextrecording?holographic-based encryption techniques. Moreover, we expose thecompact system benefits compared to conventional encrypting architectures interms of energy loss and tolerance against classical attacks applicable to anylinear cryptosystem. Experimental results validate our approach.