An interesting solution is provided in [4]. In this case, the authors propose an access control mechanism, which consists of an engine embedded into smart objects able to make authorization decisions by considering both user location data and access credentials. User location data are estimated using magnetic field measured and sent by the phone. Finally, in [5, 6] authors present location-aware systems able to localize users by exploiting an infrastructure based on the Bluetooth Low Energy technology. Then, the localization information is used to adapt the home environment to the users’ needs.