Sybil attacks and Identity Clone attacks (also known as Profile Cloning attacks) have become significant security and privacy concerns for online social network (OSN) systems integrated with reputation or evaluation mechanisms. In both attacks, adversaries first create multiple identities and then launch attacks to compromise reputation or evaluation mechanisms in OSN systems. In this paper, we...

On-line Social Networks (OSN) have become the most popular Internet service today. OSN are being embraced by companies and organisations to help connecting people, assist dealing with cooperative tasks, and develop marketing and public relations campaigns. Despite all their benefits and advantages, as happens with every new technology, they are prone to several security issues. In addition to p...

Recent work on anonymizing online social networks (OSNs) has looked at privacy preserving techniques for publishing a single instance of the network. However, OSNs evolve and a single instance is inadequate for analyzing their evolution or performing longitudinal data analysis. We study the problem of repeatedly publishing OSN data as the network evolves while preserving privacy of users. Publi...

Human mobility mining has attracted a lot of attention in the research community due to its multiple implications in the provisioning of innovative services for large metropolises. In this scope, Online Social Networks (OSN) have arisen as a promising source of location data to come up with new mobility models. However, the human nature of this data makes it rather noisy and inaccurate. In orde...

In this paper we take into consideration the concepts of using algorithmic and data mining perspective of Online Social Networks (OSNs), with special emphasis on latest hot topics of research area. There are several factors which has made the study of OSNs gain enormous importance by researchers. Few such factors include the availability of huge amount of OSN data, the representation of OSN dat...

We examine third-party Online Social Network (OSN) applications for two major OSNs: Facebook and RenRen. These third-party applications typically gather, from the OSN, user personal information. We develop a measurement platform to study the interaction between OSN applications and fourth parties. We use this platform to study the behavior of 997 Facebook applications and 377 RenRen application...

Online Social Networks (OSNs) provide a good way to make connections with people with similar interests and goals. In particular, health-centered OSNs are emerging to provide knowledge and support for those interested in managing their own health. This paper provides an empirical analysis of a health OSN, which allows its users to record their foods and exercises, track their diet progress towa...

Online social networks have seen a rapid growth inrecent years. A key aspect of many of such networks is that theyare rich in content and social interactions. Users of socialnetworks connect with each other and forming their owncommunities. With the evolution of huge communities hosted bysuch websites, users suffer from managing information overloadand it is become hard ...

Online Social Networks (OSNs) are more and more establishing as one of the key means to create and enforce social relationships between individuals. While substantial results have been obtained in the anthropology literature describing the properties of human social networks (built “outside” the OSN world), a clear understanding of the properties of social networks built using OSNs is still to ...