The Research Of Database Security Based On Intrusion Tolerance Technique

Traditional researches of database security usually focus on how to defend, such as authentication, access controlling, and firewall and intrusion detection. The motive is to build more secure database systems; the limitation is that not all intrusions can be defended effectively, especially for internal attacks. Intrusion tolerance database considers how to make the system to provide uninterrupted service in the case of intrusion, and keep the availability, integrality and confidentiality of the database.This paper discusses the technique of intrusion tolerance in detail. Basing on that, a multi-level intrusion tolerance database security model is constructed according to the requirement of security of database system. The technique of redundancy and multiformity is used in the design of agent-level and isomerous redundancy structure. That...