This Master in International Security at PSIA focuses on gathering the tools and knowledge to best apprehend and analyse issues in the international security field in the 21st century : changes in the international environment (remodelling of geopolitical systems, new forms of crises and conflicts, controversial military interventions, transnational terrorism, nuclear proliferation, cyberwarfare, etc.), conflict-ridden regions and the specific internal transformations in security and defence activities (specialisation, institutional transformation, "judicialisation", new technologies, etc.)