中国物理B ›› 2008, Vol. 17 ›› Issue (2): 419-423.doi: 10.1088/1674-1056/17/2/012

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Circular threshold quantum secret sharing

杨宇光1, 温巧燕2   

  1. (1)College of Computer Science and Technology, Beijing University of Technology, Beijing 100022, China;State Key Laboratory of Information Security, Graduate School of Chinese Academy of Sciences, Beijing 100049, China; (2)School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2007-04-19 修回日期:2007-05-28 出版日期:2008-02-20 发布日期:2008-02-20
  • 基金资助:
    Project supported by the National Basic Research Program of China (973 Program) (Grant No 2007CB311100), the National High Technology Research and Development Program of China (Grant Nos 2006AA01Z419 and 20060101Z4015), the Major Research plan of the National Natural Science Foundation of China (Grant No 90604023), 2008 Scientific Research Common Program of Beijing Municipal Commission of Education, the Scientific Research Foundation for the Youth of Beijing University of Technology (Grant No 97007016200701), the National Research Foundation for the Doctoral Program of Higher Education of China (Grant No 20040013007), the National Laboratory for Modern Communications Science Foundation of China (Grant No 9140C1101010601), and the Doctor Scientific Research Activation Foundation of Beijing University of Technology (Grant No 52007016200702).

Circular threshold quantum secret sharing

Yang Yu-Guang(杨宇光)a)b) and Wen Qiao-Yan(温巧燕)c)   

  1. a College of Computer Science and Technology, Beijing University of Technology, Beijing 100022, China; b State Key Laboratory of Information Security, Graduate School of Chinese Academy of Sciences, Beijing 100049, China; c School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2007-04-19 Revised:2007-05-28 Online:2008-02-20 Published:2008-02-20
  • Supported by:
    Project supported by the National Basic Research Program of China (973 Program) (Grant No 2007CB311100), the National High Technology Research and Development Program of China (Grant Nos 2006AA01Z419 and 20060101Z4015), the Major Research plan of the National Natural Science Foundation of China (Grant No 90604023), 2008 Scientific Research Common Program of Beijing Municipal Commission of Education, the Scientific Research Foundation for the Youth of Beijing University of Technology (Grant No 97007016200701), the National Research Foundation for the Doctoral Program of Higher Education of China (Grant No 20040013007), the National Laboratory for Modern Communications Science Foundation of China (Grant No 9140C1101010601), and the Doctor Scientific Research Activation Foundation of Beijing University of Technology (Grant No 52007016200702).

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摘要： This paper proposes a circular threshold quantum secret sharing (TQSS) scheme with polarized single photons. A polarized single photon sequence runs circularly among any $t$ or more of $n$ parties and any $t$ or more of $n$ parties can reconstruct the secret key when they collaborate. It shows that entanglement is not necessary for quantum secret sharing. Moreover, the theoretic efficiency is improved to approach 100% as the single photons carrying the secret key are deterministically forwarded among any $t$ or more of $n$ parties, and each photon can carry one bit of information without quantum storage. This protocol is feasible with current technology.

关键词: quantum secret sharing, threshold quantum secret sharing, quantum secure direct communication

Abstract: This paper proposes a circular threshold quantum secret sharing (TQSS) scheme with polarized single photons. A polarized single photon sequence runs circularly among any $t$ or more of $n$ parties and any $t$ or more of $n$ parties can reconstruct the secret key when they collaborate. It shows that entanglement is not necessary for quantum secret sharing. Moreover, the theoretic efficiency is improved to approach 100% as the single photons carrying the secret key are deterministically forwarded among any $t$ or more of $n$ parties, and each photon can carry one bit of information without quantum storage. This protocol is feasible with current technology.

Key words: quantum secret sharing, threshold quantum secret sharing, quantum secure direct communication

中图分类号:  (Quantum cryptography and communication security)

  • 03.67.Dd
42.50.-p (Quantum optics)