Despite the considerable amount of self-disclosure in Online Social Networks (OSN), the motivation behind this phenomenon is still little understood. Building on the Privacy Calculus theory, this study fills this gap by taking a closer look at the factors behind individual self-disclosure decisions. In a Structural Equation Model with 237 subjects we find Perceived Enjoyment and Privacy Concern...

Access control is the process by which authorized users are granted permission over resources. Access control models incorporate application requirements in their design and thus evolve with the applications. The rise of online social networks (OSN), like Facebook, has posed new requirements over the privacy of users’ data due to the presence of heterogeneous privacy circle. The traditional mod...

Users and resources in online social networks (OSNs) are interconnected via various types of relationships. In particular, user-touser relationships form the basis of the OSN structure, and play a significant role in specifying and enforcing access control. Individual users and the OSN provider should be allowed to specify which access can be granted in terms of existing relationships. We propo...

With the increasing popularity of online social networks (OSNs) and the ability to access and exchange sensitive user information, user privacy concerns become an important issue which have attracted the attention of researchers and policymakers. For example, deleted pictures or pictures in deleted posts may not be deleted from the OSN server immediately, and hence accessible to another unautho...

Information flows are the result of a constant exchange in Online Social Networks (OSNs). OSN users create and share varying types of information in real-time throughout a day. Virality is introduced as a term to describe information that reaches a wide audience within a small timeframe. As a case, we measure propagation of information submitted in Reddit, identify different patterns and presen...

This paper argues for the utilization of online social networks (OSNs) as clinical adjuncts in psychotherapy with adolescents and young adults. While privacy and ethics are critical issues in psychotherapy, these concerns should not overshadow the various ways that an OSN adjunct may enhance the therapeutic alliance and advance psychotherapeutic practice. The argument asserts that a joint explo...

On-line Social Networks (OSN) have become one of the most used Internet services. However, as happens with every new technology, they are prone to several security issues. Despite privacy concerns begin to emerge, there are still other dangerous vulnerabilities that affect security and threaten organisations and users assets. In this paper, we present the first Threat Modelling approach in Onli...

Online social networking (OSN) activities are becoming more prevalent in higher education. The phenomenon can be observed in many higher learning institutions around the world. There are many ways of appropriating OSN for teaching and learning. OSN enables lecturers and students to publish and share knowledge quickly and easily. However there are also several challenges which include the limite...

Online social networks (OSNs) become more and more important in today’s social and business life. Therefore, considerable effort is put in research to gain a deeper knowledge of the development of these networks and their dynamics. However, most of the existing literature is based on very limited subsets of the network data, which is often filtered by the OSN operator providing the data or bias...