The quantum key distribution network simulator (QKDNetSim) is a simulation module designed to expend NS-3 network simulator with QKD network functionalities⁠. The main purpose of the network simulator is the analysis of different approaches to QKD network organizations, simulation of networking technologies considering integration of QKD systems into existing telecommunications networks with reference to network security.

The simulator module can be accessed under the webpage https://www.open-qkd.eu/