关键词: 北斗导航系统, 信息安全保障体系, 短报文, 三层密钥机制, 加密方案

Abstract: At present, the third generation of Beidou has been deployed. Beidou system will provide navigation positioning and communication data transmission services for global users. Beidou has been widely used in transportation, land and resources, disaster prevention and mitigation, agriculture, forestry and water conservancy, surveying and mapping exploration, emergency rescue and other fields in China. However, the information security related technical standard system of Beidou system is not perfect, and the cipher application is few. This paper first analyzes the composition of Beidou system and the published technical standards. The security risks in each link of Beidou system are concluded in the paper. Then, the information security system of Beidou system is introduced according to the requirements of Classification Protection. Aiming at the unique short message application of Beidou system, an encryption solution based on three-layer key mechanism and symmetric encryption algorithm is proposed. Considering the security and the processing performance of Beidou terminal, the solution can be applied to the short message encryption field of Beidou in civil application.

Key words: Beidou navigation system, information security system, short message, three level schemes of key hierarchy, encryption solution