Ambient Intelligence (AmI) and Internet of Things (IoT) are promising fields for the application of Multi-Agent Systems (MAS). A specific MAS application, described through a video doorkeeper scenario in this paper, is the deployment and the configuration of distributed applications on a hardware infrastructure in ambient systems. It requires the modelling of the available infrastructure and of the deployable applications, respecting a domain ontology, which can then be used by reasoning tools to find the hardware entities that can support the running of the application in the existing infrastructure. It also requires a distributed architecture that allows this solution to be scalable and to provide mechanisms to enhance privacy. In this paper, we discuss this last point. We describe the use of goal-driven agents and show how the MAS architecture and organisation allow for the privacy of the infrastructure resources to be enhanced.