Physical layer security transmission mechanism of relay network based on artificial noise
基于人工噪声的中继网络物理层安全传输机制

Untrusted relay in self-organizing wireless network will lead to serious security threats. This paper proposed a physi-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.