In an era increasingly defined by “post-truth” politics, public security is no longer shaped solely by physical threats, but by the contested terrain of information itself. Misinformation, disinformation, and the lack of trust in traditional authorities complicate how societies identify risks and maintain social cohesion. Today, narratives with emotional appeal often outweigh factual accuracy. Navigating public security in the age of post-truth requires rethinking knowledge, communication, and understanding the profound implications this shift holds for civil liberties and collective resilience. Navigating Public Security in the Age of Post-Truth: Challenges and Implications explores how the erosion of truth poses serious threats to social cohesion and democratic resilience. It examines the post-truth phenomenon and its implications for public security in the 21st century. Covering topics such as public security, news, and misinformation, this book is an excellent resource for academics, researchers, policymakers, security professionals, government institutions, and graduate students.