| Multiparty Quantum Remote Secret Conference |
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| 作者姓名： | 李熙涵 李春燕 邓富国 周萍 梁玉洁 周宏余 |
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| 作者单位： | [1]The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beljing Normal University, Beijing 100875 [2]Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875 [3]Beijing Radiation Center, Beijing 100875 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10604008 and 10435020, and Beijing Education Committee under Grant No XK100270454. |
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| 摘 要： | We present two schemes for multiparty quantum remote secret conference in which each legitimate conferee can read out securely the secret message announced by another, but a vicious eavesdropper can get nothing about it. The first one is based on the same key shared efficiently and securely by all the parties with Greenberger-Horne- Zeilinger （GHZ） states, and each conferee sends his secret message to the others with one-time pad crypto-system. The other one is based on quantum encryption with a quantum key~ a sequence of GHZ states shared among all the conferees and used repeatedly after confirming their security. Both these schemes are optimal as their intrinsic efficiency for qubits approaches the maximal value.
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| 关 键 词： | 远程会议 密码子 物理学 多渠道 |
| 修稿时间： | 2006-10-16 |
Multiparty Quantum Remote Secret Conference |
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| LI Xi-Han,LI Chun-Yan,DENG Fu-Guo,ZHOU Ping,LIANG Yu-Jie,ZHOU Hong-Yu.Multiparty Quantum Remote Secret Conference[J].Chinese Physics Letters,2007,24(1):23-26. |
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| Authors: | LI Xi-Han LI Chun-Yan DENG Fu-Guo ZHOU Ping LIANG Yu-Jie ZHOU Hong-Yu |
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| Institution: | The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875
Beijing Radiation Center, Beijing 100875 |
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| Abstract: | We present two schemes for multiparty quantum remote secret conference in which each legitimate conferee can read out securely the secret message announced by another, but a vicious eavesdropper can get nothing about it. The first one is based on the same key shared efficiently and securely by all the parties with reenberger--Horne--Zeilinger (GHZ) states, and each conferee sends his secret message to the others with one-time pad crypto-system. The other one is based on quantum encryption with a quantum key, a sequence of GHZ states shared among all the conferees and used repeatedly after confirming their security. Both these schemes are optimal as their intrinsic efficiency for qubits approaches the maximal value. |
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| Keywords: | 03 67 Hk 03 65 Ud |
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