Darmstadt University of Technology
In this paper, the authors deal with security in Online Social Networks (OSN). It introduces Online Social Networks as the digital representations of relationships, which their users entertain in the physical world. Social Network Providers (SNP), commonly commercial entities that offer Social Networking Services (SNS), the access to the OSN, and their users, are identified as the main actors in online social networking. Sponsors, application providers, and data analysts are third parties in this paper and they represent further actors.