The topic of Information diffusion has been in the centre of sociology interest for many years. Even before the rise of Online Social Networks (OSNs), social ties and the way the information flows have been studied in traditional reallife social networks. In this paper, we propose the concept of multilayer information flow, by considering every On-line Social Network (OSN) as a separate layer a...

Targeted online advertising elicits a potential threat.A commercial agent has a chance to mitigate the visibility of hisopponents because their sales or services are of similar types. Inthis paper, we consider the competition for attention in popularonline social networks (OSNs) that usually employ a timeline-based homepage to sort messages chronologically in a limitedvi...

Safety is a concern for most urban communities; police departments bear the majority of responsibility to maintain law and order and prevent crime. Police agencies across the globe are increasingly using Online Social Network (OSN) (such as Facebook and Twitter) to acquire intelligence and connect with citizens. Developing nations like India are however, still exploring OSN for policing. We int...

The proliferation of online social networking (OSN) in recent years has caused organizations information security threats due to disclosure of information by their employees on their sites. The accessibility of OSN to anyone, at any time, using any devices, causes confidential and sensitive organizational information to be disclosed to unauthorised individuals, whether accidentally or intention...

Online social networks (OSNs) are playing an important role in current world and the way people communicate with each other. Despite the advantage of using online social networks, there are certain privacy risks that can affect users of such services. Since users provide a lot of personal information in OSNs, concerns about how data placed in online social networks may raise among the users. So...

Online Social Networks (OSNs) offer access control mechanisms to protect users’ sensitive information from undesired accesses. Yet, their information is still vulnerable to disclosure when their friends assign conflicting privacy policies: a user prohibits everyone from accessing his own content or profile but his friends allow others to see it. OSNs tend to select Permit-Take-Precedence when r...

today, online social networks are very popular due to the possibility of creating relationships between people all over the world. these social networks with possibilities such as friend recommendation generally use local features derived from social graph structure. for friend recommendation, there are different algorithms with local and global approaches. in this paper, we proposed an algorit...

Over the last five years, several trends have changed the landscape of the World Wide Web, forming the new “Web 2.0”. The advent of user generated content (blogs and wikis), the popularity of multimedia (e. g., YouTube and MySpace), and the penetration of Google’s services (maps, mail, etc.) are commonly noticeable. In particular, the recent popularity of Online Social Networks (OSNs, e. g., Fa...

Online social networks (OSNs) are a unique web and social phenomenon, affecting tastes and behaviors of their users and helping them to maintain/create friendships. It is interesting to analyze the growth and evolution of online social networks both from the point of view of marketing and offer of new services and from a scientific viewpoint, since their structure and evolution may share simila...