Security issues in satellite networks

Abstract

Satellite networks have played an increasing important role in modern communication system for their flexible and convenient feature. It is obvious that satellite communication systems tend to be hybrid networks and IP networks in the future. They will provide data broadcasting services and Internet services. As in all other networks, security is a severe challenge in satellite systems. In this paper, we construct a three-layer hierarchical satellite system and propose a protocol for it. The protocol includes inter-layer security and end-to-end security. We apply asymmetric cryptography and symmetric cryptography to provide security and efficiency as well. This protocol is also suggested to protect the satellite network from eavesdropping, sophistication, masquerade and repudiation.