An Efficient and Secure Arbitrary N-Party Quantum Key Agreement Protocol Using Bell States

• URL: http://arxiv.org/abs/2309.12719v1
• Date: Fri, 22 Sep 2023 09:02:18 GMT
• Title: An Efficient and Secure Arbitrary N-Party Quantum Key Agreement Protocol Using Bell States
• Authors: Wen-Jie Liu, Yong Xu, Ching-Nung Yang, Pei-Pei Gao and Wen-Bin Yu
• Abstract summary: Two quantum key agreement protocols using Bell states and Bell measurement were recently proposed by Shukla et al. Zhu et al. pointed out that there are some security flaws and proposed an improved version. This study shows the present protocol can guarantee the correctness, security, privacy and fairness of quantum key agreement.
• Score: 16.277401577186605
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Two quantum key agreement protocols using Bell states and Bell measurement were recently proposed by Shukla et al.(Quantum Inf. Process. 13(11), 2391-2405, 2014). However, Zhu et al. pointed out that there are some security flaws and proposed an improved version (Quantum Inf. Process. 14(11), 4245-4254, 2015). In this study, we will show Zhu et al.'s improvement still exists some security problems, and its efficiency is not high enough. For solving these problems, we utilize four Pauli operations {I, Z, X, Y } to encode two bits instead of the original two operations {I,X} to encode one bit, and then propose an efficient and secure arbitrary N-party quantum key agreement protocol. In the protocol, the channel checking with decoy single photons is introduced to avoid the eavesdropper's flip attack, and a post-measurement mechanism is used to prevent against the collusion attack. The security analysis shows the present protocol can guarantee the correctness, security, privacy and fairness of quantum key agreement.

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