Narrow Results

A quantum key network that shields equipment and communication networks is proposed to address the issue of complicated key relations of equipment in Quantum Key Distribution (QKD) network. Taking into account the key relations of nodes in quantum key network, a quantum key network model to study the key relations in QKD network is developed using graph theory. The paper firstly provides a detailed introduction to the principle of QKD and its limitations, then studies the topology structure of QKD network and mechanism of the quantum key distributed service, and finally adopts graph theory to construct a key relations based quantum key network model to study key distributing processes in QKD network.