TY JOUR TI MATHEMATICAL DESCRIPTION AND CLASSIFICATION OF COMPLEX INFORMATION FLOWS CONSIDERING FALSE AND HARMFUL INFORMATION KW complex information flow KW classification of information KW false information KW malicious information KW reliable information KW probabilistic models KW information security KW flow analysis KW entropy JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Yartseva, N.A. PY 2026 IS 2026 PB Saint-Petersburg University of State Fire Service of Emercom of Russia