Streszczenie
Contemporary societies are defined as risk societies since the state of permanent risk generated by internal and external factors is its characteristic feature. This results from the level of complexity of contemporary world, its economic and social mechanisms and its new 5th dimension – cyberspace called IT systems tissue keeping the modern civilization alive. Cyberspace being a new field of any human activities and so threats, constitutes a crucial element of the state security system. Analyzing acts of terror, their influence and effects as well as defining the actions taken to eliminate them allow to estimate the security level of systems and the real level of cyberterroristic threat also with reference to Polish geopolitical and geostrategic conditions.