This paper presents results from a two-round Expert-Delphi (N 1 =227, N 2 =126), realized in 2014, which focuses on the following research question: What are the most relevant developments affecting public security in Germany until 2030? Theoretically the survey is based on a conceptual framework that includes assumptions on calculating the probable occurrence of risks, the relevance of megatrends and the implications of both on public security. Preliminary results show the relevance of the

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... easing dependency on Information and Communication Technologies (ICT), increasing exposure of critical infrastructures, the global mobility of men and goods and the widening gap between rich and poor as relevant for public security in Germany. Furthermore the potential impact of risks like ICT-crime, extreme weather events and pandemics are rated high, while their expected probability of occurrence differs from medium to high.