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| 基于纠缠交换和局域操作的量子秘密共享 | |
| 引用本文： | 秦素娟,刘太琳,温巧燕.基于纠缠交换和局域操作的量子秘密共享[J].北京邮电大学学报,2005,28(4):74-77. |
| 作者姓名： | 秦素娟 刘太琳 温巧燕 |
| 作者单位： | 1. 北京邮电大学,理学院,北京,100876;西安电子科技大学,综合业务网国家重点实验室,西安,710071 2. 山东财政学院,济南,250014;北京邮电大学,理学院,北京,100876 3. 北京邮电大学,理学院,北京,100876 |
| 基金项目： | 国家自然科学基金，国家重点实验室基金，高等学校博士学科点专项科研项目，ISN开放基金 |
| 摘 要： | 为提高量子秘密共享的效率，提出了一种直接共享经典消息的协议. 协议充分利用了Bell态纠缠交换和局域操作的性质. 为了检测是否存在窃听者，通信粒子被分为检测和消息2部分，对检测部分采用共轭基测量的方法确保传输安全后，再对消息部分作局域操作编码. 分析表明该协议是安全的，效率可以达到2个Bell态共享2?bit经典消息. |
| 关 键 词： | 量子秘密共享 纠缠交换 量子密码 |
| 文章编号： | 1007-5321（2005）04-0074-04 |
| 收稿时间： | 2004-09-06 |
| 修稿时间： | 2004年9月6日 |
Quantum Secret Sharing Based on Entanglement Swapping and Local Operation |
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| QIN Su-juan,LIU Tai-lin,WEN Qiao-yan.Quantum Secret Sharing Based on Entanglement Swapping and Local Operation[J].Journal of Beijing University of Posts and Telecommunications,2005,28(4):74-77. | |
| Authors: | QIN Su-juan LIU Tai-lin WEN Qiao-yan |
| Affiliation: | 1School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China; 2State Key Laboratory of Integrated Services Network, Xidian University, Xi'an 710071, China; 3Shandong Finance Institute, Jinan 250014, China |
| Abstract: | To improve the efficiency of quantum secret sharing, a protocol share the message directly among the users was proposed. The scheme made full use of entanglement swapping of Bell states and local operations. For detection of eavesdropping, the EPR pairs were divided into two parts: the checking parts and the encoding parts. After insuring the security of the quantum channel by measuring the checking particles in conjugate bases, the sender encoded her bits via the local unitary operations on the encoding parts. Investigation shows that the protocol is secure and two Bell states can be used to share two bits message. |
| Keywords: | quantum secret sharing entanglement swapping quantum cryptography |
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