Research and Design of Key Management System in Power Distribution Network Based on Quantum Private Communication

Power distribution operation involves the supervision and control of the operating states of a large distribution power grid. This technology includes several features, e.g. an abundant amount of application nodes, diversity of communication channels, etc. To accelerate the construction of State Grid-electric Internet of things and to guarantee the security of power grids data network and to consider the feature of power grids, a synthetic key management system is proposed. In the first section of this paper, from the perspective of maturity and practicality of related technology, the feasibility of combining quantum private communication and automatic power grid key management system is analyzed and demonstrated. In the next section, a key-management method, which is designed to combine quantum private communication technology and interaction with encryption devices, is designed and implemented. In the concluding section, to guarantee the integrity and atomicity in key storage processes and to achieve the quantum key storage, rollback mechanism of large-capacity quantum key storage is studied and discussed.