The Multi-level Self-Adaptive Space Communication Security Protocol

In order to solve the problem that the security protocol of SCPS-SP uses relatively simple security services in CCSDS space communications, which cannot provide traffic analysis and protection, we analyzed the current space communication security protocol, combining the situation of the increasing communication bandwidth. Finally, we designed the multi-level self-adaptive space communication security protocol with self adaption, and also presented space communications protocol for security tunnels. After introducing these protocols respectively from the situation for application and data units of protocol, we conducted a preliminary definition of SA´s secure attributes, which are the basis for space communications security protocols. This security protocol efficiently approaches the demands of space communication protections in different application schemes, realizing the optimization of the multi-level information security control and efficiency for protections, which also contains the function of the flow rate analysis.