2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91443Coherent one photon pulses are sent with four possible time delays with respect to a reference. Ambiguity of the photon time detection resulting from pulses overlap combined with interferometric measurement allows for secure key exchange.2 pages, 2 figures, Proceedings from the QELS conference, june 1-6, 2003, QTuB2Quantum Physicstext