Overview on Physical Layer Security in Low Earth Orbit (LEO) Satellite System

Based on Shannon's Theory, positive secrecy capacity could support secure communication. The LEO satellite system is proposed for internet service. The issues of privacy and security become progressively important in internet applications. Conventionally, the security scheme is applied to the highernetwork layer. However, the fundamental ability of the physical layer to provide secure transmission. This work leads the encryption to code and to analyze the security rate in the LEO system. The coding scheme with memory aided could provide a positive secrecy capacity of the system.