Аннотация: Today, interest in information security problems is manifested primarily in the aspect of large systems, which include especially important objects and organizations of the state level. If we approach large systems as information systems, in which information processing and their organization largely depend on the use of IT, then such information security threats are usually characterized as a manifestation of cyber terrorism. Attention to cyber terrorism has greatly increased throughout the world, including in the post-soviet space, which stimulated research and exchange of information on the problems of combating it.