Journal
OPTICS COMMUNICATIONS
Volume 281, Issue 17, Pages 4553-4554Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2008.05.026
Keywords
quantum secret sharing; entanglement swapping
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Funding
- National High Technology Research and Development Program of China [2006AA01Z419]
- Major Research Plan of the National Natural Science Foundation of China [90604023]
- National Laboratory for Modern Communications Science Foundation of China [9140C1101010601]
- Natural Science Foundation of Beijing [4072020]
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In a recent paper [Z.J. Zhang et al., Opt. Commun. 269 (2007) 418], a protocol of multiparty quantum secret sharing was presented. We study the security of this protocol and found that it is not secure for a dishonest agent Charlie, who can illegally elicit half of Alice's secret message by himself. Finally a feasible improvement of this quantum secret sharing protocol is proposed. (c) 2008 Elsevier B.V. All rights reserved.
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