Titlebook: Security and Trust Management; 6th International Wo Jorge Cuellar,Javier Lopez,Alexander Pretschner Conference proceedings 2011 Springer-Ve

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Automated Symbolic Analysis of ARBAC-Policies,ted analysis techniques have been proposed to help maintaining desirable security properties of ARBAC policies. One limitation of many available techniques is that the sets of users and roles are bounded. In this paper, we propose a symbolic framework to overcome this difficulty. We design an automa

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Rewrite Specifications of Access Control Policies in Distributed Environments,buted across several sites. This distributed metamodel is an extension of the .-based metamodel proposed in previous work (from which standard centralised access control models such as MAC, DAC, RBAC, Bell-Lapadula, etc. can be derived). We use a . in order to give an . to the distributed metamodel.

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Aggregating Trust Using Triangular Norms in the KeyNote Trust Management System,is the notion that triangular norms and conorms provide a natural and consistent interpretation for trust aggregation across delegation chains. It is argued that specifying how trust is aggregated is as important as specifying a degree of trust value in an attribute certificate and, therefore, in st

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An Authentication Trust Metric for Federated Identity Management Systems,eb services that control access, but it is more difficult for a service provider to evaluate the assurance of a user’s identity if the creation and propagation of user authentication assertions involve different authentication authorities and mediators. On the basis of this formal representation, an