Participant attack on quantum secret sharing based on entanglement swapping
Song Ting-Ting(宋婷婷)a)b)†, Zhang Jie(张劼)c), Gao Fei(高飞)a), Wen Qiao-Yan(温巧燕)a), and Zhu Fu-Chen(朱甫臣)d)
aState Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China; bState Key Laboratory of Integrated Services Network, Xidian University, Xi'an 710071, China; c School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; dNational Laboratory for Modern Communications, P.O. Box 810, Chengdu 610041, China
Abstract The security of quantum secret sharing based on entanglement swapping is revisited and a participant attack is presented. In this attack two dishonest agents together can illegally recover the secret quantum state without the help of any other controller, and it will not be detected by any other users. Furthermore, by modifying the distribution process of particles and adding a detection step after each distribution process, we propose an improved protocol which can resist this kind of attack.
Received: 08 July 2008
Revised: 05 August 2008
Accepted manuscript online:
Fund: Project supported by the National
High Technology Research and Development Program of China (Grant No
2006AA01Z419), the Major Research Plan of the National Natural
Science Foundation of China (Grant Nos 90604023, 60873191 and
60821001), the National Labo
Cite this article:
Song Ting-Ting(宋婷婷), Zhang Jie(张劼), Gao Fei(高飞), Wen Qiao-Yan(温巧燕), and Zhu Fu-Chen(朱甫臣) Participant attack on quantum secret sharing based on entanglement swapping 2009 Chin. Phys. B 18 1333
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