Plug computers enable any of us to maintain cheap nano-clusters of Raspberry Pis at home, and to host data and services. These plug-based systems offer a middle-ground between traditional data-centers and P2P networks. In contrast to data-centers, plug-based systems rely on autonomous participants. This clearly puts back the control of our digital lives in the users’ hands and reduces the asymmetric relationship many of us maintain with our service providers. Differently from P2P network, plug-based systems provide a stable infrastructure that exhibits little churn, and opens the possibility of novel and optimized mechanisms. In this deliverable, we focus on users’ queries. They have been shown to be a valuable resource, so that democratizing their access should support the flourishing of new creative activities. Without opposition to solutions brought by major companies, we aim at an alternative and complementary proposal to existing systems which opens the ability to enhance users’ data to many more, while respecting their privacy. In this task, our two main objectives are: i) to define a generic organization that enables a community of users to share and capitalize on their queries and provided results, and ii) to permit the use of aggregation queries preserving privacy even if related to private data.