In the monograph, different methodologies for identifying disinformation and fake news sources have been studied, and intelligent methods and innovative tools for fake news detection have been proposed. The monograph is intended for specialists in cybersecurity, machine learning, linguistics, information resources processing and analysis, and artificial intelligence systems, as well as for those obtaining an educational and scientific level of higher education in information technology knowledge. The research was carried out with the grant support of the National Research Fund of Ukraine, "Information system development for automatic detection of misinformation sources and inauthentic behaviour of chat users", project number 33/0012 from 3/03/2025 (2023.04/0012).