I. Introduction
The last semester of 2015 saw several attempts from States to tighten their control over the digital domain. The Russian Duma passed a bill in September mandating Internet Service Providers (ISPs) to locate servers hosting data from Russian citizens in Russia, thus protecting these data from what was perceived as an intrusive global surveillance by the NSA (and allowing the FSB to spy on Russian dissenters). The following month, the European Court of Justice struck down the Safe Harbor Agreement which until then permitted US companies to transfer data from European users outside the European Union. Despite their similarities in terms not only of sovereignty but also of mistrust vis arthur.laudrain@kel.ac.uk). vis the United States, these two events reveal the deeply rooted ambiguities of cyberspace. However, their implications for international security and cooperation between States are far from similar.