with the main difference that it is more focused on cheap practical devices. Regarding the application of security and privacy-preserving mechanisms in the context of smart buildings, a semantic ar- chitecture is described in [6]. The proposal is developed on top of the Open Services Gateway Initiative (OSGi) framework and incorporates a semantic model of a smart home system. In addition, an access control policy is designed to give home own- ers robust control over the way users can access their devices. Moreover, in [7],