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The security and recent technology of quantum key distribution |
| WANG Xiang-bin1, PENG Cheng-zhi1, YING Hao2, PAN Jian-wei2, MA Huai-xing3, YANG Tao3 |
| 1.Department of Physics, Tsinghua University, Beijing 100084, China; 2.Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China; 3.China Electronic System Engineering Company, Beijing 100039, China; |
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Abstract In principle, quantum key distribution (QKD) can be used to make unconditionally secure private communication. However, the security of the existing real system for QKD needs to be carefully examined. Actually, the existing experiments based on weak coherent states are not secure under photon-number-splitting attack. Fortunately, the decoy-state method and the entanglement-distribution method can be used to realize the unconditionally secure QKD based on real-life systems with existing technology.
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Issue Date: 05 September 2006
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