| 利用GHZ态实现可控的量子秘密共享 |
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| 引用本文： | 孙莹,秦素娟,温巧燕,朱甫臣.利用GHZ态实现可控的量子秘密共享[J].北京邮电大学学报,2008,31(1):9-13. |
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| 作者姓名： | 孙莹 秦素娟 温巧燕 朱甫臣 |
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| 作者单位： | 北京邮电大学;北京邮电大学;北京邮电大学 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金，教育部高等学校博士学科点专项科研基金，国家重点实验室基金，北京市自然科学基金 |
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| 摘 要： | 提出了一种利用Greenberger-Horne-Zeilinger(GHZ)态实现秘密重建时机可控的量子秘密共享方案. 该方案充分利用了GHZ态3个粒子间的相关性和Hadamard门的特殊性质，通过让Bob和Charlie共享GHZ态共享联合密钥，并使用Hadamard门保证了协议的可控和安全. 方案中，平均消耗1个GHZ态可以共享3 bit经典信息. 由于所有量子态的传输都是单向的，且除去用于检测窃听的粒子外其他均用于有效传输密钥，所以量子比特效率理论上接近100%.
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| 关 键 词： | 量子密码学 量子秘密共享 Greenberger-Horne-Zeilinger态 Hadamard门 |
| 文章编号： | 1007-5321（2008）01-0009-05 |
| 收稿时间： | 2007-02-04 |
| 修稿时间： | 2007年2月4日 |
Controllable Quantum Secret Sharing Using GHZ States |
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| SUN Ying,QIN Su-juan,WEN Qiao-yan,ZHU Fu-chen.Controllable Quantum Secret Sharing Using GHZ States[J].Journal of Beijing University of Posts and Telecommunications,2008,31(1):9-13. |
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| Authors: | SUN Ying QIN Su-juan WEN Qiao-yan ZHU Fu-chen |
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| Affiliation: | 1. School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; 2. National Laboratory for Modern Communications, P.O.Box 810, Chengdu 610041, China |
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| Abstract: | Based on Greenberger-Horne-Zeilinger（GHZ） state, a controllable quantum secret sharing scheme was proposed. In this scheme, the quantum correlations among the three particles in a GHZ state and the characteristics of the Hadamard gate were exploited sufficiently. Bob and Charlie could obtain the joint key by sharing GHZ states. The Hadamard gate ensured the protocol controllable and secure. One GHZ state could be used to share three bits of message on average. Because all the quantum states are transmitted unidirectionally, and all particles except for the checking ones are used to transmit the joint key, this protocol has the advantage of high intrinsic efficiency, which approaches to 100% in theory. |
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| Keywords: | quantum cryptography quantum secret sharing Greenberger-Horne-Zeilinger state Hadamard gate |
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