Considering Interdependent Protection Goals in Domain-Specific Contexts: The di.me Case Study

In domain-specific contexts such as ecosystems of equal applications, usually individual requirements in terms of quality attributes and interdependent protection goals arise which need to be taken into account for e.g., deployment decisions. Current Quality-of-Service (QoS) models however are mostly static and handle security either as single attribute or decompose it into several independent attributes. In this paper we present our approach, which addresses this gap by defining protection goals as interdependent utility functions over QoS attributes. We show an application of this approach on the EU FP7 project di.me, namely the di.me ecosystem of private user deployed and managed servers.