Quantum Key Distribution Protocol Based on GHZ Like State and Bell State

摘要

In this paper, we propose a multi-party quantum key distribution protocol using Bell state particles and GHZ like particles. The protocol adds Charlie between Alice and Bob. Alice and Bob can establish a secret key with Charlie at the same time. Through security analysis, Alice and Bob can't eavesdrop on each other's key. The three parties can not cheat each other. The protocol can also resist eavesdroppers. The advantage of this protocol is that two different keys can be established among three parties at the same time.