2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91885This paper has been withdrawn by the authors,because the proposed protocol is still coverd by the no-go theorem of Mayers, Lo and Chau. We thank H-K. Lo and HF Chau for helpful correspondences.This paper was withdrawnQuantum PhysicsAn Unconditionally Secure Quantum Bit Commitment Schemetext