Flexible authentication and authorization architecture for grid computing

The Globus Toolkit makes it very easy and comfortable for grid users to develop and deploy grid services. As for the security mechanism, however, only static authentication and coarse-grained authorization mechanism is provided in current Globus Toolkit. In this paper, we address the limitations of current security mechanism in the Globus Toolkit and propose a new architecture which provides fine-grained and flexible security mechanism which works in dynamic environment. To implement this without modifying existing components, we make use of the aspect-oriented programming technique.