基于人工噪声的中继网络物理层安全传输机制

摘要

Untrusted relay in self-organizing wireless network will lead to serious security threats. This paper proposed a phy-si-cal-layer security mechanism based on interference nodes. The transmission was divided into two phases; first, sent signal with artificial noise from the sender and interference nodes to relay, second, restored the original information by receiver with the help of interference nodes. As the signal received by the relay and the eavesdropper were always accompanied with severe interference, security of the system was well guaranteed. Simulation results show that, when the eavesdropper and interference nodes are in different locations, the system always has a large secure-transmission rate.%针对无线自组织网的不可信中继节点会带来严重安全威胁的问题,提出利用干扰节点保障通信的物理层安全机制.其信息传输分为两个阶段:中继节点获得来自发送端和干扰节点的含人工噪声的信号；目的接收端在干扰节点的协助消噪后还原出原始信息.由于中继节点和窃听者的接收信号始终伴随严重的噪声干扰,系统具有较高的安全性.仿真结果表明,窃听者和干扰节点在处于不同地理位置时,系统均具有较大的安全传输速率.