Service-oriented architectures (SOAs) are a commonly used paradigm for IT infrastructures in various fields. Due to their flexibility and the easy accessibility of their underlying web services, SOAs are the architecture of choice for more and more service providers. Semantic SOAs (SSOAs) are going one step further and are enhancing the common SOA with semantic components.However, a major success criterion of any SOA is the existence of a reliant security infrastructure. Therefore, this paper identifies security requirements for an eGovernment SSOA focusing on communication security, trust, privacy and access control. Our work is based on the architecture designed within the scope of the European research project Access-eGov, which envisions the development of a SSOAbased eGovernment platform.

Abstract-The shift from mere service-oriented architectures (SOA) to semantically enriched approaches is especially being forced in multi-domain environments that the public sector in the European Union is an example for. The security aspect is lagging behind its possibilities, and new access control approaches native to the semantic environment need to be applied. Based on architectural research work conducted within the EU-funded research project Access-eGov, we outline our implementation of a semantic security architecture for web services by using industry-standard technologies and combining them with semantic enhancements.

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