Improving the security of multiparty quantum secret sharing based on the improved Boström-Felbinger protocol |
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Authors: | Song Lin Qiao-Yan Wen Fu-Chen Zhu |
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Affiliation: | a State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China b School of Mathematics and Computer Science, Fujian Normal University, Fuzhou 350007, China c National Laboratory for Modern Communications, P.O. Box 810, Chengdu 610041, China |
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Abstract: | 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. |
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Keywords: | 03.67.&minus a 03.65.Ta 89.70.+c |
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