TY JOUR TI MODELING OF THE INTRUDER, INFRASTRUCTURE AND ATTACKS IN INFORMATION SECURITY SYSTEMS KW information security KW intruder model KW cyber attacks KW risk assessment KW network protection JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Chechulin, A.A. PY 2024 IS PB Saint-Petersburg University of State Fire Service of Emercom of Russia