The conference took place in December 2020. Scientific results presented by the conference participants are briefly outlined below. The conference sections were theoretical and methodological questions of security support, problems of economic and sociopolitical security support, problems of information security support, ecological and technogenic security, modeling and decision-making for complex systems security control, automatic systems and means of complex systems security support, and legal aspects of complex systems security support. Special attention was paid to the problems caused by the coronavirus pandemic. At the conference, 130 authors from 42 organizations (Russia and some foreign countries) presented 91 papers