Secrecy performance of terahertz wireless links in rain and snow

Wireless communication technique operating at terahertz (THz) frequencies is regarded as the most potential candidate for future wireless networks due to its wider frequency bandwidth and higher directionality when compared with that employing radio (RF) millimeter waves (mmWaves). It has been proved high owned by THz links could help reduce possibility of eavesdropping attacks physical layer. However, outdoor applications in adverse weathers (such water fog, dust rain snow), scattering absorption effects suffered a link weather particles gaseous molecules degrade secrecy performance seriously. In this work, we present theoretical investigations on layer security point-to-point snow eavesdropper locating outside legitimate path. Signal degradation rain/snow, attenuation beam divergence are included model estimate performance. Secrecy capacity carriers 140, 220 340 GHz calculated compared. We find rain/snow intensity, carrier receiver sensitivity affect their influence insecure region maximum safe data transmission rate discussed summarized.