Supporting XML Security Models Using Relational Databases: A Vision

As the secure distribution and sharing of information over the World Wide Web becomes increasingly important, the needs for flexible and e#cient support of access control systems naturally arise. Since the eXtensible Markup Language (XML) is emerging as the format of the Internet era for storing and exchanging information, there have been, recently, many proposals to extend the XML model to incorporate security aspects. To the lesser or greater extent, however, such proposals neglect the fact that the data for XML documents will most likely reside in relational databases, and consequently do not utilize various security models proposed for and implemented in relational databases

Programmable Security For Object-Oriented Systems

This paper focuses on "programmable security" for object-oriented systems and languages. A primitive distributed object model is used to capture the essence of object behavior and access control schemes. This model can be used to construct virtually any distributed object language or system while supporting a spectrum of decentralized authorization models