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Towards the Realization of Decentralized Online Social Networks: An Empirical Study

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3 Author(s)
Narendula, R. ; Sch. of Comput. & Commun. Sci., EPFL, Lausanne, Switzerland ; Papaioannou, T.G. ; Aberer, K.

As the Online Social Networks (OSNs) amass un-precedented amounts of personal information, the privacy concerns gain considerable attention from the community. Apart from privacy-enabling approaches for existing OSNs, a number of initiatives towards building decentralized OSN infrastructures have emerged. However, before this paradigm becomes a serious alternative to current centralized infrastructures, some key design challenges, often conflicting with each other, have to be addressed. In this paper, we explore such design objectives concerning various system properties, namely availability, replication degree, user online times, privacy, and experimentally study the trade-offs among them based on real data sets from Facebook and Twitter. We introduce different mechanisms to model user online times in the OSN from their activity times. We demonstrate how different profile replica selection approaches significantly affect the system performance.

Published in:

Distributed Computing Systems Workshops (ICDCSW), 2012 32nd International Conference on

Date of Conference:

18-21 June 2012

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