IMPETUS is a Horizon 2020 project that will provide city authorities with new means to address security issues in public spaces, and so help protect citizens. Using data gathered from multiple sources, it will facilitate detection of threats and help human operators dealing with threats to make better informed decisions. IMPETUS addresses three complementary areas: Technology: Leverage the power of Internet of Things (IoT), Artificial Intelligence (AI) and Big Data analysis to provide powerful tools to manage physical and cyber security in cities. Ethics: Balance potentially conflicting needs to collect, transform and share large amounts of data with the imperative of ensuring protection of data privacy – all in the context of ensuring benefits to society. Processes: Define cognitive processes and deployment guidelines supporting decision making and coordination, fully aligned with the needs of multiple city stakeholders involved in security operations. The IMPETUS project receives funding from Horizon 2020, the European Union's Framework Programme for Research and Innovation (H2020), under Grant Agreement No. 883286.