Performance optimization of decoy-state BB84- and MDI- QKD protocol and their key integrating application strategy for power dispatching

Abstract

Abstract Quantum cryptography is an effective means to improve the information security level of power dispatch data networks. From the perspective of quantum key supply and demand balance, this paper adopts the local search algorithm to implement full parameter optimization (including both the pulse intensities and all the probability parameters) for both decoy-state biased-basis based BB84 and measurement-device-independent (MDI) quantum key distribution (QKD) protocols, and compares their key application performance. Then, the BB84 and MDI quantum key integrated application strategy is designed for multi-service power dispatching systems, and the tests of jointly dynamic adjustment to the multi-node key-update frequency and application mode are carried out. The test results show that the proposed integrated application strategy not only fully considers the differences of information security requirements of various services, but also maximizes the actual security of power dispatch data transmission.