2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92741Please goto the "Note Added" part of v6, quant-ph/0501143The paper is withdrawn by the author because its main scientific content has been moved to the "Note Added" part of quant-ph/0501143, v6Quantum PhysicsComment on "Practical Decoy State for Quantum Key Distribution"text