关键词: 数据库安全, 访问控制, 推理控制, 组合优化, 安全模型

Abstract: Based on the consideration of current database security, factors influencing database security were analyzed. Three hiberarchy security system frameworks of database system were brought up. Technological measures controlling three hiberarchy frameworks security of database system were discussed. A new database security protection model was designed based on the above-mentioned. Thus, multilayer security control cooperation and management of database can be realized, and it can ensure the database security. Finally, the future tasks on database security were discussed.