Post date: 27-Mar-2012 16:13:37
Upcoming seminar
On the security of social networks
(a formal viewpoint on ReBAC policies)
Tuesday, April 10, 2012 - 15:00
Aula C, Dipartimento di Matematica e Informatica - Via Ospedale 72, Cagliari
Alceste Scalas
Dipartimento di Matematica e Informatica
UniversitĂ degli Studi di Cagliari
Abstract. Social networks introduce Relationship-Based Access Control (ReBAC), allowing or preventing users to view each others' data according to the reputation and social closeness of their profiles. This novel security model, however, depends on the topology of the social network itself, which could be maliciously altered by colluding users or pseudonymous profiles ("Sybil attack"). Is it possible to ensure that ReBAC policies cannot be bypassed by such activities? Formal modeling and analysis provide an answer to this question.