2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91591This paper presents a hybrid cryptographic protocol, using quantum and classical resources, to generate a key for authentication and optionally for encryption in a network. One or more trusted servers distribute streams of entangled photons to individual resources that seek to communicate. An important class of cheating by a compromised server will be detected.7 pages, 1 figureQuantum Physicstext