MDI-QKD协议性能优化及电力调度量子密钥应用策略

电力调度数据网是现代大型互联电网的神经中枢，随着智能电网的发展，调度数据网面临着越来越严峻的信息安全风险，而诱骗态测量设备无关(MDI)量子密钥分发(QKD)协议是目前安全性和实用性结合较好的一种QKD协议。针对中国分层集控架构的电力调度数据网，首先从量子密钥供给的角度出发，利用局部搜索算法对对称和非对称情况下的MDI-QKD协议进行了参数优化，给出了其优化成钥速率。然后从量子密钥使用的角度出发，设计了针对电力核心调度业务的量子密钥应用策略，并进行了多节点时隙与业务密钥更新频率的联合动态调整测试。测试结果表明，提出的面向电力调度的MDI量子密钥供给与应用策略可以很好地提升多节点QKD的效率和应对多种异常情况的发生，进而能够最大限度地保障电力调度数据网核心业务数据传输的安全性。

Performance Optimization of MDI-QKD Protocol and Quantum Key Application Strategies in Power Dispatching

Power dispatching data network(PDDN)is the nerve center of modern large-scale interconnected power grids. With the development of smart grid, PDDN faces increasingly serious information security risks, while the decoy-state measurement-device-independent(MDI)-quantum key distribution(QKD)protocol is a kind of QKD protocol that combines security and practicality better up to now. This paper takes Chinese PDDN with hierarchical centralized control architecture as the research prototype. Firstly, from the perspective of quantum key supply, the local search algorithm is adopted to optimize the configuration parameters of both symmetric and asymmetric MDI-QKD protocols, and their optimal secure key rates are given. Then, from the perspective of quantum key usage, the quantum key application strategy for the core dispatching services is designed, and the joint dynamic adjustment tests of multi-node time-slot and service key-update-frequency are carried out. The test results show that the proposed MDI quantum key supply and application strategy for power dispatching can improve the efficiency of multi-node QKD and cope with the occurrence of various abnormal emergencies, and thus maximize the security of data transmission of PDDN.