一种可实用的量子保密查询方案

A Practical Quantum Private Query Scheme

在量子保密通信网络中,保护用户隐私和数据库的安全显得尤为重要.考虑噪声在实际通信过程的影响,提出了一种噪声情况下可实用的量子保密查询方案.首先,在初始化阶段通过量子纠缠对来进行身份的验证,保障通信的安全性;其次,在密钥分发过程中,通信双方进行联合Bell基测量来推断密钥信息,使其单个用户仅能得到一部分密钥;最后,接收端利用CSS量子纠错码进行相应的纠错工作,保护用户隐私和防止窃听.通过对该方案的安全性和通信效率的理论分析,验证本方案是具有抗噪声能力的协议,不仅提高了协议通信的效率,还具有实际应用的意义.

In quantum secure communication network,it is very important to protect the privacy of query users and database.Considering the influence of noise in the actual communication process,this paper proposes a practical quantum private query scheme in the case of noise.Firstly,the initialization phase is used to verify the identity through quantum entanglement pair,which ensures the security of communication;secondly,in the process of key distribution,the two communication parties infer the key information by combining Bell basis measurement,and a user only obtains part of the key information.Finally,the receiver uses CSS quantum error correction code to perform corresponding error correction,which can protect user privacy and prevent eavesdropping.Therefore,according to theoretical analysis of the security and communication efficiency of the scheme,it is verified that the scheme is a protocol with anti-noise capability,which not only improves the efficiency of protocol communication,but also has the significance of practical application.