Preserving Link Privacy in Social Network Based Systems

TitlePreserving Link Privacy in Social Network Based Systems
Publication TypeJournal Articles
Year of Publication2012
AuthorsMittal P, Papamanthou C, Song D
JournalarXiv:1208.6189 [cs]
Date Published2012/08/30/
KeywordsComputer Science - Cryptography and Security, Computer Science - Social and Information Networks

A growing body of research leverages social network based trust relationships to improve the functionality of the system. However, these systems expose users' trust relationships, which is considered sensitive information in today's society, to an adversary. In this work, we make the following contributions. First, we propose an algorithm that perturbs the structure of a social graph in order to provide link privacy, at the cost of slight reduction in the utility of the social graph. Second we define general metrics for characterizing the utility and privacy of perturbed graphs. Third, we evaluate the utility and privacy of our proposed algorithm using real world social graphs. Finally, we demonstrate the applicability of our perturbation algorithm on a broad range of secure systems, including Sybil defenses and secure routing.