Optical Satellite Eavesdropping

In recent years, satellite communication (SatCom) systems have been widely used for navigation, broadcasting application, disaster recovery, weather sensing, and even spying on the Earth. As number of satellites is highly increasing with radical revolution in wireless technology, eavesdropping SatCom will be possible next-generation networks. this context, we introduce approach, where an spacecraft can intercept optical communications established between a low Earth orbit high altitude platform station (HAPS). Specifically, propose two practical scenarios satellite-to-HAPS (downlink) HAPS-to-satellite (uplink) communications, attacker eavesdrop transmitted signal or received signal. To quantify secrecy performance scenarios, average capacity outage probability expressions are derived validated Monte Carlo simulations. Moreover, throughput proposed models investigated. We observe that turbulence-induced fading significantly impacts free-space communication.