Ontology-Based Access Control Model for Semantic Web Services

Studies show that reducing the gap between security services and semantic web is important. In this paper we present an ontology-based access-control (OBAC) to support semantic web service. For that, security ontologies are developed to specify concepts and terms involved in this model. Our proposed access control model is expressive and general with these important features: (i) The use of ontology provides reasoning ability for access control decision making, and allows access control information to be automatically searched, queried and discovered. (ii) Our proposed model has a higher degree of interoperability compared to other approaches of access control mechanism. This is because of the nature of ontologies in providing semantic interoperability. (iii) Our proposed model is context sensitive; the constraint ontology represents different types of context constraint. (iv) Our proposed model is designed based on the widely accepted semantic web languages, Web Ontology Language (OWL) and Web Ontology Language for Service (OWL-S), therefore its implementation can be easily achieved by using already existing tools designed for working with these languages.

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