Emergency Management Agencies (EMA) are increasingly adopting online social network (OSN) such as Twitter and Facebook for interacting with partner institutions and citizens for sourcing and distributing of vital crisis information. However, EMA need to study and analyze how well they are using and, how they should be using the OSN. This paper adopts a holistic social architecture driven approa...

Maintaining data availability is one of the biggest challenges in decentralized online social networks (DOSNs). The existing work often assumes that the friends of a user can always contribute to the sufficient storage capacity to store all data. However, this assumption is not always true in today's online social networks (OSNs) due to the fact that nowadays the users often use the smart mobil...

The wide adoption of smart phones has enabled Online Social Networks (OSN) to exploit the location awareness capabilities offering users better interaction and context aware content. While these features are very attractive, the publication of users’ location in an OSN exposes them to privacy hazards. Recently, various protocols have been proposed for private proximity testing, where users are ...

The problem of identifying influencers in an online social network (OSN) has received a lot of attention recently. However, the influence a user has on an OSN depends a lot on how active they are, besides their reputation, or the quality of information they are capable of providing. This can be misleading: a common observation about many OSNs is that the most influential users there are not wel...

The explosion of online social networking (OSN) in recent years has caused damages to organisations due to leakage of information by their employees. Employees’ social networking behaviour, whether accidental or intentional, provides an opportunity for advanced persistent threats (APT) attackers to realise their social engineering techniques and undetectable zero-day exploits. APT attackers use...

This paper reports on the privacy threat posed by inferences in Online Social Netoworks. Specifically, it discusses the difficulties involved in taming this important privacy threat and describes, at a high-level, the design of a mechanism to tackle this problem. This mechanism is hybrid, combining privacy and transparency enhancing technologies. 1 The Inference Threat The vast reach of Web 2.0...

In the past, online social networks (OSN) like Facebook and Twitter became powerful instruments for communication and networking. Unfortunately, they have also become a welcome target for socialbot attacks. Therefore, a deep understanding of the nature of such attacks is important to protect the Eco-System of OSNs. In this extended abstract we propose a categorization scheme of social bot attac...

Online Social Networks (OSNs) provide the easiest way to stay connected to the people dear and important to us. People are using social networking sites for sending messages, sharing files and expressing their thoughts to others. Popular social networking sites like Facebook, MySpace are web based. Users register with their services and agree to provide their private data to the OSN providers. ...

Self-disclosure, the act of revealing oneself to others, is an important social behavior that contributes positively to intimacy and social support from others. It is a natural behavior, and social scientists have carried out numerous quantitative analyses of it through manual tagging and survey questionnaires. Recently, the flood of data from online social networks (OSN) offers a practical way...

Online social networking is perhaps the biggest phenomenon of the Internet. Recently, there has been a rising concern over technology dependency. Recognizing that little theoretical and empirical attention has been given to examine technology dependency in the IS discipline, this study aims to examine the role of technology dependency in habit formation in the context of online social networkin...