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Issue No. 04 - July-Aug. (2016 vol. 13)
ISSN: 1545-5971
pp: 424-436
Yuan Cheng , University of Texas at San Antonio, USA
Jaehong Park , University of Alabama in Huntsville, USA
Ravi Sandhu , University of Texas at San Antonio, USA
Users and resources in online social networks (OSNs) are interconnected via various types of relationships. In particular, user-to-user relationships form the basis of the OSN structure, and play a significant role in specifying and enforcing access control. Individual users and the OSN provider should be enabled to specify which access can be granted in terms of existing relationships. In this paper, we propose a novel user-to-user relationship-based access control (UURAC) model for OSN systems that utilizes regular expression notation for such policy specification. Access control policies on users and resources are composed in terms of requested action, multiple relationship types, the starting point of the evaluation, and the number of hops on the path. We present two path checking algorithms to determine whether the required relationship path between users for a given access request exists. We validate the feasibility of our approach by implementing a prototype system and evaluating the performance of these two algorithms.
Computational modeling, Authorization, Social network services, Marine vehicles, Context

Y. Cheng, J. Park and R. Sandhu, "An Access Control Model for Online Social Networks Using User-to-User Relationships," in IEEE Transactions on Dependable and Secure Computing, vol. 13, no. 4, pp. 424-436, 2016.
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