Trust and Security for the Semantic Web

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This research investigates distributed trust management as analternative to traditional authentication and access control schemesin dynamic and pen computing environments such as multiagent systems,web services and pervasive computing. Distributed trust managementhandles security with techniques used in human societies, where peopleare judged on their abilities, assets, relationships and reputations.Authorization decisions are made through the application of relevantsecurity and trust policies, expressed in a high-level declarativelanguage. The policies define rules and constraints on agents (humanor software) and the actions they can take on objects in terms oftheir credentials and properties. This work extends the principles oftrust management with deontic notions of rights, obligations, andprohibitions. An ontology grounded in a semantic language (e.g., RDF,DAML or OWL) is used to represent security information constitutingcredentials, policies, beliefs, and proofs as well as relevantdomain-specific properties to characterize the agents, actions andobjects. An important results will be a better understanding of howthe semantic web can address the critical issues of security, trustand privacy in distributed open environments. The new concepts andtechniques will be evaluated and demonstrated through theimplementation of prototype tools and applications