Cryptanalysis and Improvement of a Multiparty Quantum Direct Secret Sharing of Classical Messages with Bell States and Bell Measurements

被引：0
作者：
Xiao-Fen Liu
机构：
[1] Fujian Normal University,College of Mathematics and Informatics
来源：
International Journal of Theoretical Physics | 2019年 / 58卷
关键词：
Quantum secret sharing; Bell states; Cryptanalysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Recently, a multiparty quantum direct secret sharing protocol with Bell states was presented (Song et al., Int. J Theor. Phys. 57, 1559, 2018). In this protocol, the secret message of the dealer is directly encoding into the transmitted particles. All agents obtain their pieces of secret by making Bell state measurement on their receiving particles, then cooperate to recover the dealer’s secret. However, as we show, this protocol is insecure, because an outside attacker or two special dishonest agents can eavesdrop the secret fully. Furthermore, an improved version of this protocol is proposed, which can stand against the presented attacks.
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页码：713 / 718
页数：5
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