Quantum Cryptographic Network Using Entanglement Swapping

Traditional quantum key distribution schemes are carried out one-on-one. Both quantum and classical channels are needed between any two users. This paper presents a quantum cryptographic network based on entanglement swapping and a key manage center. People can fulfill key distribution between any two users. Only channels between manage center and users are needed while users need no communications between each other. So it can save resource effectively and it is more reliable and flexible.