Abstract: In order to improve the security of database，the main encryption techniques applied to databases are studied.The algorithms of encryption and the main steps of algorithm implementation are discussed，and an example is given.At last，the key management and the encryption/unencryption influence on system functions of the database are expounded.The research results are valuable in the field of security of spacecraft simulation data.

Key words: spacecraft simulation platform, database encryption techniques, encryption/unencryption, key

摘要： 从提高数据的安全性出发，对航天器仿真平台中的数据库加密技术进行研究。详细论述数据库的加密算法及其算法实现的主要流程，并给出了某航天器仿真平台数据库管理系统加密实例；同时还阐述了密钥管理，加密解密对系统功能的影响。该研究结果对保证航天器仿真数据的安全具有一定的实用价值。

关键词: 航天器仿真平台, 数据库加密技术, 加密/解密, 密钥