该文提出了一种基于三重DES加密算法的数据库系统加密方案,该方案中的密钥是根据动态密钥生成策略生成的.理论分析及实验结果显示,该数据库加密系统兼顾了加密的效率和数据库的安全性,较好地解决了密钥量大,密钥管理不便等问题.“,”This paper presents a dynamical secret key building algorithm based on the triple DES and designs a database encryption system based on it. The secret key doesn't need to be stored for the reason that it is created by dynamical secret key building algorithm when encrypting or decrypting the data. Theoretical analysis and experimental results demonstrates that this database encryption system makes a good balance of the efficiency and the database security and also does a good solution to questions of huge quantities of secret keys and key management.