title: Security authentication using phase-encoded nanoparticle structures and polarized light.
abstract: Phase-encoded nanostructures such as quick response (QR) codes made of metallic nanoparticles are suggested to be used in security and authentication applications. We present a polarimetric optical method able to authenticate random phase-encoded QR codes. The system is illuminated using polarized light, and the QR code is encoded using a phase-only random mask. Using classification algorithms, it is possible to validate the QR code from the examination of the polarimetric signature of the speckle pattern. We used Kolmogorov-Smirnov statistical test and Support Vector Machine algorithms to authenticate the phase-encoded QR codes using polarimetric signatures.
authors: Artur
authors: A
authors: Carnicer
authors: Amir
authors: A
authors: Hassanfiroozi
authors: Pedro
authors: P
authors: Latorre-Carmona
authors: Yi-Pai
authors: YP
authors: Huang
authors: Bahram
authors: B
authors: Javidi