TY JOUR TI COMPLEXITY GRADUATION MODEL FOR ASSESSMENT OF INFORMATION SYSTEMS SECURITY IN SYSTEM OF THE DISTRIBUTED SITUATIONAL CENTERS OF EMERCOM OF RUSSIA KW information security KW system of the distributed situational centers KW information system KW security KW complex system KW complexity level KW model KW information security assessment JO Problems of risk management in the technosphere AU Eremenko, S.P. AU Khitov, S.B. AU Krutolapov, A.S. PY 2016 IS 2016 PB Saint-Petersburg University of State Fire Service of Emercom of Russia