Abstract
Research into initiatives worldwide shows that although some of the legal and or-ganizational barriers for the adoption of new technologies in e-government have been lifted, there are still not many implementations of actual e-government ser-vices that have been designed based on a common and systematic approach. The prevailing requirements for e-government services, interoperability and security, pose major challenges to e-government architects and it is now being slowly un-derstood that Web services in combination with public key infrastructures may provide the necessary solutions. In this context, this chapter presents three innova-tive e-government services based on these technologies, focusing on their security and interoperability aspects. The goal of the chapter is to demonstrate the ser-vices’ specifications and use cases so that they may act as examples for further re-search and development.
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