Design and Analysis of Secure Quantum Network System with Trusted Repeaters

Quantum key distribution (QKD) has received great attention towards future secure communication systems. Since the laws of the quantum mechanics make sure the security and it cannot be cracked by using any mathematical method, there is a great deal of research work in this area which achieves groundbreaking progress. However, some obvious issues are still the obstacle of the daily use of QKD, such as the distance of communications. Using trusted repeaters is a promising approach to extend the range of QKD. This paper proposes a possible QKD system with current network structures and comes up with a novel method of using trusted repeaters to satisfy the requirement of secure QKD network.