Abstract

Quantum key agreement requires all participants to recover the shared key together, so it is crucial to resist the participant attack. In this paper, we propose a verifiable multi-party quantum key agreement protocol based on the six-qubit cluster states. A verifiable distributor who preserves some subsequences of the six-qubit cluster states is introduced into this protocol, thus the participants cannot obtain the shared key in advance. Besides, the correctness and simultaneity of the shared key are guaranteed by the trusted design combiner and homomorphic hash function. Furthermore, the security analysis shows that the new protocol can resist the external and internal attacks.

Graphic abstract

中文翻译：

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一种基于六量子比特簇状态的可验证量子密钥协商协议

摘要

量子密钥协商需要所有参与者共同恢复共享密钥，因此抵御参与者攻击至关重要。在本文中，我们提出了一种基于六量子比特集群状态的可验证多方量子密钥协商协议。该协议引入了一个可验证的分发器，该分发器保留了六量子位集群状态的一些子序列，因此参与者无法提前获得共享密钥。此外，可信设计组合器和同态哈希函数保证了共享密钥的正确性和同时性。此外，安全性分析表明，新协议可以抵抗外部和内部攻击。

图形摘要