User-Generated services: Policy Management and access control in a cross-domain environment

The rapid evolution of mobile computing, together with the spread of social networks is increasingly moving the role of users from simple information and services consumers to actual producers. Currently, while most of the critical aspects related to User-Generated Contents (UGC) have been addressed, many issues related to service generation still must be faced and represent the next challenge. In this work, we focus on security issues raised by a particular kind of services: those generated by users. User-Generated Services (UGS) are characterized by a set of features that distinguish them from conventional services. To cope with UGS security problems we introduce three possible policy management models, analyzing benefits and drawbacks of each approach. Finally, we propose a cloud-based solution that enables the composition of multiple UGS and policy models, allowing user´s devices to share features and services among them.