Improvement of “Novel Multiparty Quantum Key Agreement Protocol with GHZ States”
Improvement of “Novel Multiparty Quantum Key Agreement Protocol with GHZ States”
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DOI：
10.1007/s10773-017-3478-4
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发表时间：
2017-08
影响因子：
1.4
通讯作者：
Jun Gu;T. Hwang
中科院分区：
文献类型：
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作者：
Jun Gu;T. Hwang
量子密钥协商（QKA）协议是一种在互不信任的参与者之间协商公平、安全的密钥的方法。最近，Xu等人（Quantum Inf. Process. 13：2587-2594，2014）提出了基于Greenberger-Horne-Zeilinger（GHZ）状态的多方QKA协议。然而，这项研究指出，Xu等人'的协议不能提供公平性。也就是说，协议中最后涉及的参与者可以操纵最终的共享密钥，而不会被其他参与者检测到。此外，根据Yu et al. s research（2015），Xu et al.的协议也不能避免公开讨论攻击。为了避免这些缺点，提出了一种改进的QKA协议。
Quantum key agreement (QKA) protocol is a method for negotiating a fair and secure key among mutually untrusted participants. Recently, Xu et al. (Quantum Inf. Process. 13:2587–2594, 2014) proposed a multi-party QKA protocol based on Greenberger-Horne-Zeilinger (GHZ) states. However, this study points out that Xu et al.’s protocol cannot provide the fairness property. That is, the last involved participant in the protocol can manipulate the final shared secret key without being detected by the other participants. Moreover, according to Yu et al.’s research (2015), Xu et al.’s protocol cannot avoid the public discussion attack too. To avoid these weaknesses, an improved QKA protocol is proposed.