title: One Step Quantum Key Distribution Based on EPR Entanglement.
abstract: A novel quantum key distribution protocol is presented, based on entanglement and dense coding and allowing asymptotically secure key distribution. Considering the storage time limit of quantum bits, a grouping quantum key distribution protocol is proposed, which overcomes the vulnerability of first protocol and improves the maneuverability. Moreover, a security analysis is given and a simple type of eavesdropper's attack would introduce at least an error rate of 46.875%. Compared with the "Ping-pong" protocol involving two steps, the proposed protocol does not need to store the qubit and only involves one step.
authors.affiliation: School of Computer Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.|Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Computer Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.|JiLin Medical University, Jilin, 132013, China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.affiliation: School of Computer Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Lei-Lei
authors.initials: LL
authors.lastname: Li
authors.affiliation: School of Computer Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang