Delegation logic: A logic-based approach to distributed authorization
ACM Transactions on Information and System Security (TISSEC)
Resolving Conflicts in Authorization Delegations
ACISP '02 Proceedings of the 7th Australian Conference on Information Security and Privacy
Logic-Based Reasoning on Delegatable Authorizations
ISMIS '02 Proceedings of the 13th International Symposium on Foundations of Intelligent Systems
A representation model of trust relationships with delegation extensions
iTrust'05 Proceedings of the Third international conference on Trust Management
Implementation aspects of a delegation system
Proceedings of the 3rd international conference on Mobile multimedia communications
Enabling attribute delegation in ubiquitous environments
Mobile Networks and Applications
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This paper elaborates on a solution to represent authorization and delegation in a graphical way, allowing users to better interpret delegation relationships. We make use of Weighted Trust Graph (WTG) as an instrument to represent delegation and authorization, extending it to cope with more complicated concepts, and providing a graphical representation of the level of confidence that exists between two entities regarding a resource or attribute. We represent the level of confidence for each pair of entities as a point in an axis diagram, as a set of points, or as a set of triangular regions depending on the accuracy we need. Then, we use the same diagram to represent the set of acceptable confidence level, that we call authorization policy set. In this way, a single diagram can be used to decide about authorization, thus providing a powerful tool for systems in which interaction of users is needed.