»Foreign telecommunications surveillance by the German Federal Intelligence Service«: The German Federal Intelligence Service surveils foreign telecommunications by analyzing content and metadata on a mass scale. The study points out that the Basic Law also protects foreigners not residing on German territory. Furthermore, it discusses how the strategic surveillance that is not based on specific grounds and only limited by the purpose pursued can by justified in the light of Art. 10 of the Basic Law protecting the confidentiality of individual communications and Art. 8 ECHR.