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Cryptanalysis of Multiparty Quantum Secret Sharing of Quantum State Using Entangled States |
| QIN Su-Juan1,2, WEN Qiao-Yan1,2, ZHU Fu-Chen3 |
| 1,2 State Key Laboratory for Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 1008762School of Science, Beijing University of Posts and Telecommunications, Beijing 1008763National Laboratory for Modern Communications, Chengdu 610041 |
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| Cite this article: |
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QIN Su-Juan, WEN Qiao-Yan, ZHU Fu-Chen 2008 Chin. Phys. Lett. 25 3551-3554 |
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Abstract Decoy state quantum key distribution (QKD), being capable of beating PNS attack and being unconditionally secure, has become attractive recently. However, in many QKD systems, disturbances of transmission channel make the quantum bit error rate (QBER) increase, which limits both security distance and key bit rate of real-world decoy state QKD systems. We demonstrate the two-intensity decoy QKD with a one-way Faraday--Michelson phase modulation system, which is free of channel disturbance and keeps an interference fringe visibility (99%) long period, over a 120km single mode optical fibre in telecom (1550nm) wavelength. This is the longest distance fibre decoy state QKD system based on the two-intensity protocol
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| Keywords:
03.67.Hk
03.65.Ud
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Received: 07 April 2008
Published: 26 September 2008
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| PACS: |
03.67.Hk
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(Quantum communication)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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