This diploma thesis provides a basic description and an indication of technical and legislative issues that are closely related to the safety of civil aviation. Well known accidents related to illegal acts are also described in this paper. The aim of this paper is to assess the current personnel?s state and knowledge relating to civil aviation security at international airports, focusing on the airport in České Budějovice. Two hypotheses are presented H ? 1 and H ? 2, which are evaluated using statistical survey and to perform structural analysis of security at international airports in the Czech Republic and structural analysis of security system of LKCS and then compare them, or possibly suggest additional measures that would increase sec...