Xidian Universitity, State Key Laboratory of Integrated Service Networks, Xi'an, 710071, China.
University of Science and Technology of Anhui, School of Information and Network Engineering, Chuzhou, 233001, China.
Sci Rep. 2017 Mar 23;7:45046. doi: 10.1038/srep45046.
Quantum key agreement is an important topic that the shared key must be negotiated equally by all participants, and any nontrivial subset of participants cannot fully determine the shared key. To date, the embed modes of subkey in all the previously proposed quantum key agreement protocols are based on either BB84 or entangled states. The research of the quantum key agreement protocol based on quantum search algorithms is still blank. In this paper, on the basis of investigating the properties of quantum search algorithms, we propose the first quantum key agreement protocol whose embed mode of subkey is based on a quantum search algorithm known as Grover's algorithm. A novel example of protocols with 5 - party is presented. The efficiency analysis shows that our protocol is prior to existing MQKA protocols. Furthermore it is secure against both external attack and internal attacks.
量子密钥协商是一个重要的话题，共享密钥必须由所有参与者平等协商，任何非平凡的参与者子集都不能完全确定共享密钥。迄今为止，所有先前提出的量子密钥协商协议中的子密钥嵌入模式都是基于 BB84 或纠缠态。基于量子搜索算法的量子密钥协商协议的研究仍然是空白。在本文中，在研究量子搜索算法的性质的基础上，我们提出了第一个基于量子搜索算法的量子密钥协商协议，其子密钥的嵌入模式基于量子搜索算法，称为 Grover 算法。提出了一个新的五方协议的例子。效率分析表明，我们的协议优于现有的 MQKA 协议。此外，它对外部攻击和内部攻击都是安全的。
