Simulation of quantum key distribution in a secure star topology optimization in quantum channel

The field of quantum cryptography is mostly theoretical therefore in this paper we represent its implementation
by means of virtual scenarios. The central issue in cryptography is the secure transmission of the key between
nodes. Thus, in this paper we establish a secure channel using Quantum Key Distribution (QKD) for the transfer
of the key material between the nodes and help to identify an eavesdropper in the channel. A graphical repre- sentation of the quantum channel traffic at the ideal state and also during network disruption has been estab- lished. Due to the complex nature of quantum networks and high cost of stablishment, a physical mplementation of the same is not feasible. Hence a simulation has been implemented via the use of NS-3 (Network Simulator Version 3) which has QKDNetSim module built into it. Finally, our simulation indicates the presence of an intruder by virtue of various network implementations within the quantum channel.