Orchestration of secure Web Services within an E-government Interoperability Platform

The Uruguayan e-government agency has made available an Interoperability Platform (InP) with the purpose of facilitating the implementation of e-government services. By leveraging the Web Services technology, public agencies have implemented various atomic services which are usually hosted at the agencies but have to be accessed through proxy services in the InP. Given that the implementation of e-government processes involves invoking multiple services, the mechanisms to implement service orchestrations are increasingly required. Although there are well-known solutions for orchestrating Web Services, their application within the InP presents challenges, in particular, regarding the integration with its Security System. This paper proposes alternatives for implementing orchestrations of secure Web Services within the InP. The proposal consists of a base architecture that can be configured to implement different solution alternatives, enabling its application in other similar scenarios. The proposal was completely prototyped which allowed evaluating some operational aspects of the solution.