What is Objective Trees

The use of Digital Rights Management (DRM) systems involves several stakeholders, such as the content provider, the license provider, and the user, each having their own incentives to use the system. Proper use of the system implies that these incentives can only be met if certain security requirements are fulfilled. Much attention in literature has been devoted to specific security aspects of DRM systems. The contributions of this chapter consist of deriving a systematic overview of core security requirements for DRM systems. This chapter conducts a stakeholder analysis, gives an objective tree for each relevant stakeholder, and develops a simple, generic conceptual model to arrive at the set of core security requirements.