The potential impact of cyber-attacks against critical infrastructures is remarkable – the malfunction or total loss of public energy grids, the banking system, supply chains or public administration can cause enormous economic damage and massively affect entire nations. A key asset of AIT is tight cooperation with national stakeholders in Austria on solutions and technologies to prevent those threats and mitigate devastating effects. Our strategy allows researchers to work together with stakeholders from industry and government in realistic environments on the design, implementation and validation of methods, technologies and processes for establishing an increased level of defense against cyber attacks.