OPTICAL PHYSICAL UNCLONABLE FUNCTION BASED ON A MULTIMODAL WAVEGUIDE

摘要

An optical physical unclonable device and method are disclosed, which are based on random excitation and guiding of optical modes through an optical waveguide which contains random defects and/or dirt and/or impurities in its core, and/or in the core-sheath interface and/or in the input and output faces. The high physical complexity of the optical physical unclonable function (o-PUF) and the non-reproducible nature of the random defects make tampering or study of the device by reverse engineering difficult. Configurations of the device enable the provision of a two-token securing scheme which makes it resistant against playback attacks and modelling attacks.