Kiktenko Evgeniy O, Tayduganov Andrey, Fedorov Aleksey K
Laboratory of Quantum Information Technologies, National University of Science and Technology "MISIS", Moscow 119049, Russia.
Entropy (Basel). 2024 Dec 16;26(12):1102. doi: 10.3390/e26121102.
We develop a novel key routing algorithm for quantum key distribution (QKD) networks that utilizes a distribution of keys between remote nodes, i.e., not directly connected by a QKD link, through multiple non-overlapping paths. This approach focuses on the security of a QKD network by minimizing potential vulnerabilities associated with individual trusted nodes. The algorithm ensures a balanced allocation of the workload across the QKD network links, while aiming for the target key generation rate between directly connected and remote nodes. We present the results of testing the algorithm on two QKD network models consisting of 6 and 10 nodes. The testing demonstrates the ability of the algorithm to distribute secure keys among the nodes of the network in an all-to-all manner, ensuring that the information-theoretic security of the keys between remote nodes is maintained even when one of the trusted nodes is compromised. These results highlight the potential of the algorithm to improve the performance of QKD networks.
我们为量子密钥分发（QKD）网络开发了一种新颖的密钥路由算法，该算法通过多条不重叠路径在远程节点（即未通过QKD链路直接连接的节点）之间进行密钥分发。这种方法通过最小化与单个可信节点相关的潜在漏洞来关注QKD网络的安全性。该算法确保了QKD网络链路间工作负载的平衡分配，同时以直接连接节点和远程节点之间的目标密钥生成率为目标。我们展示了在由6个和10个节点组成的两个QKD网络模型上测试该算法的结果。测试表明该算法能够以全对全的方式在网络节点之间分发安全密钥，确保即使其中一个可信节点被攻破，远程节点之间密钥的信息理论安全性仍能得到维持。这些结果突出了该算法提升QKD网络性能的潜力。
