Quantum key distribution strategy based on ant colony algorithm in Quantum Trusted Relay Network

Aiming at the problem that the quantum key distribution strategy in the existing QKD network based on key relay cannot meet the routing requirements in the hybrid network environment, we analyzes the routing characteristics of the classic-quantum hybrid network and proposes the corresponding routing requirements, and then designs the quantum key distribution strategy based on ant colony algorithm. The ant colony algorithm is used to analyze the execution cost of ants to search for the best global quantum key distribution, which improves the key routing efficiency in the classical and quantum hybrid network environment. Simulation results show that the proposed scheme has the advantages of fast convergence of routing update, small delay of quantum key distribution and more balanced network load.