Smart and Secure: Fluorescent Polymers Revolutionizing Anti‐Counterfeiting Strategies

Abstract Traditional anti‐counterfeiting methods have become increasingly inadequate in combating sophisticated counterfeiting activities. Fluorescent polymer materials have attracted considerable attention owing to their exceptional optical properties, structurally tunable frameworks, and versatile processability. These materials have been widely utilized in the development of anti‐counterfeiting inks, films, and hydrogels. Anti‐counterfeiting strategies can be categorized into single‐, dual‐, and multi‐level systems, depending on their security complexity and information capacity. This review systematically examines recent advancements in fluorescent polymer‐based anti‐counterfeiting technologies, with a focus on their design principles, material platforms, and integration methodologies across different security levels. Furthermore, the review highlights the advantages and limitations of each strategy and discusses emerging trends such as stimuli‐responsiveness, information encryption, and intelligent anti‐counterfeiting. Finally, the review identifies current challenges and proposes future research directions to advance the rational design of next‐generation high‐performance anti‐counterfeiting solutions.