提出了一种基于诱骗态的广域量子安全直接通信网络方案.在每一个局域网中设置一个服务器负责量子态的产生和测量,从而提高了通信距离; 将诱骗态的思想引入量子安全直接通信,采用不同的强度发送光脉冲,能够克服光子数目分割攻击,从而提高通信的安全性; 根据信道参量估计了不同通信距离的通过率,为信道编码提供了依据.对所提方案进行了安全性分析,结果表明此方案能够实现远距离量子安全直接通信.

A scheme for wide-area Quantum Secure Direct Communication (QSDC) Network based on decoy states is proposed.A server which is used to prepare and measure photons,is set in each local area network,so the communication distance increases.In addition,the idea of decoy states,which is to send photon pulses of different intensities to detect Photon Number Splitting (PNS) attack,is introduced to QSDC to improve the security of the communication.And,the transmission probability is estimated based on the channel parameter,which can be used as a reference for channel coding.Security analysis result shows that this protocol can be used to realize long distance QSDC.