The current deliverable provides a gap analysis between the findings of Deliverable 2.2 and Deliverable 3.2 of e-SIDES. Deliverable 2.2 had the objective to provide a general assessment of ethical, legal, societal and economic issues that emerge in different big data contexts in general. Deliverable 3.2 provided a technology-specific assessment of classes of currently existing privacy-preserving big data solutions including their effectiveness in addressing ethical and societal issues and the challenges that arise from the very implementation of these solutions. In Deliverable 3.2 we concluded that ethical and societal issues remain present, mainly because available technologies are not widely integrated into big data solutions. This implementation gap is the focus of this report.