Carnicer González, ArturoHassanfiroozi, AmirLatorre-Carmona, PedroHuang, Yi-PaiJavidi, Bahram2015-01-092015-01-092015-01-070146-9592https://hdl.handle.net/2445/61126Phase encoded nano structures 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.4 p.application/pdfeng(c) Optical Society of America, 2015Reconeixement de formes (Informàtica)Seguretat informàticaXifratge (Informàtica)Polarització (Llum)Processament digital d'imatgesPattern recognition systemsComputer securityData encryption (Computer science)Polarization (Light)Digital image processinginfo:eu-repo/semantics/article6454182015-01-09info:eu-repo/semantics/openAccess25679827