The Research And Implement Of Distributed Database Security Management Policy In Tax Department

The security of data is always given considerable attention by all the important departments of our country, especially for the confidential departments such as the Ministry of Public Security and Tax Department. All data may become worthless instantly without reliable protective measures. What's more, the previous information won't be useful for analysis. Our work will come to a standstill. Even the large database application platform, which supplies technology for electronic government affairs, needs a set of safeguarding measure to prevent any illegal access and revision from the Internet.At present, there is still a great deal of problem in the application of the secure model of the distributed database. Based on distributed database system and secure characteristic, this dissertation analyzed its database security policy and related secure model, the system appearance and operational rules, studied the customer role management, security policy and rights of role, especially studied the Bell?LaPadula model.(including its basic concept, system appearance, related operation and set of security rules).According to the actual application environment, this carried Bell?LaPadula model to entity to turn, through a research discover that model adoption compulsory security policy, attain a vivid secure control not easily, so increase the security policy of the independent access control mechanism to carry on " relaxation" to the original model, and greatly increased rule, put forward a new kind of secure mechanism-DBSC.This paper emphasizes on the researching of security policy of large RDB based on B/S three-tier system structure, and discussion of the data security management policy from every side of account management, authority management, view management, rule management, audit monitor, data dictionary track. This paper, which uses object-orient designing idea, designs and realizes a common data security control system in database platform of the tax department.