this paper emphasize on the research of security strategy of large rdb based on b / s three-tier system structure, and discuss of the data security management strategy from every side of account management, authority management, view management, rule management, audit monitor, data dictionary track . this paper, which use orient-object model designing idea, design and realize a common data security control of application system 本論文側(cè)重研究基于bs三層體系結(jié)構(gòu)下的大型關(guān)系數(shù)據(jù)庫的安全機制,從用戶管理、授權(quán)機制、靜態(tài)設(shè)置、角色管理、審計監(jiān)控、數(shù)據(jù)跟蹤,多側(cè)面、多角度討論了數(shù)據(jù)安全管理策略,并且利用面向?qū)ο蠼K枷?,在《龍口港信息系統(tǒng)》中構(gòu)建并實現(xiàn)這種通用模型??數(shù)據(jù)庫安全控制器dbsc的設(shè)計理念。