Nga VuTrung D HaCHIEN-HAO LIUPai-Yen Chen2025-04-152025-04-152024-11-05https://www.scopus.com/record/display.uri?eid=2-s2.0-85218207757&origin=recordpagehttps://scholars.lib.ntu.edu.tw/handle/123456789/728088In this work, we study the sensitivity of Fano-type resonant scattering from a core-shell (plasmonic-dielectric) nanoparticle and its potential applications in optical encryption and hardware security. Specifically, we present the physical unclonable function (PUF) based on the scattering cross section (SCS) spectra of core-shell nanoparticles, of which the ultrahigh sensitivity near the Fano resonance makes their scattering properties highly sensitive to nanomanfacturing process variations. Such a property leads to a perfect entropy source for the generation of PUF-based cryptographic keys encoded in scattering responses. Our numerical and statistical results show that this optical PUF can exhibit excellent uniqueness and randomness for effective encryption.electromagnetic scatteringFano resonancehardware securityphysical unclonable functionsphysically unclonable functionsconference paper10.1109/ISAP62502.2024.10846538