Security in Service-oriented Grid

Service-oriented architecture (SOA) is the most common used approach for building architectural decisions of a system. SOA is an architectural model for developing reliable distributed systems, which functionality is provided as services. Features from this approach are services' interoperability, loose-coupling, reusability and discoverability. Grid is a new technology for using computers, network and devices. The Grid is infrastructure for coordinate use of distributed resources, shared by different institutes, computational centers and organizations. Grid is dynamic and heterogeneous system, beyond any institutional or organization boundaries. Considering this, the development and integration of Gird application in such dynamic and heterogeneous environment is a great challenge. Something more developing of Grid application is still tightly related with the underlying middleware and its security. Service-oriented Grids are one step further in integration of Grid application, because of the SOA features. These benefits from Grid and SOA however will require and new security approaches for building application. In this article, we will briefly describe some known security approaches in SOA and Grid and how they are applied in security models of two well known service-oriented grid architectures - OGSA and EGA.