Research On Native XML Database And Its Access Control

With rapid development of information science,XML is more and more widely used in every field of the world.And XML database is brought to manage this semi-Structural files.According to the definition of XML:DB,there are three kinds of XML databases,which are Native XML Database,XML Enabled Database and Mixed XML Database.Because the application environment of the XML database is so complicated as legacy RDBMS,it faces serious security problems.This paper is mainly on Native XML Database and its Access Control.Firstly,in this paper,we review the histories of XML and XML Database,and all kinds of data models used widely now.Then we review traditional access control policies and policies specially used on XML,and present a new expression method of access set on XML based on child tree of W3C data model.And we bring RBAC model into XML database and present a new XML access model X-RBAC.Because the usage of data in databases has high frequency,we present an IDS model based on Access Set Density to logging the potential security threats.And then we introduce the design and implementation of a prototype of our Native XML Database NHX and its access control system.Finally,we draw a conclusion for this paper and the future work.