2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97173Within the simultaneous message passing model of communication complexity, under a public-coin assumption, we derive the minimum achievable worst-case error probability of a classical fingerprinting protocol with one-sided error. We then present entanglement-assisted quantum fingerprinting protocols attaining worst-case error probabilities that breach this bound.10 pages, 1 figureQuantum Physicstext