Recent Progress in Smart Polymeric Gel‐Based Information Storage for Anti‐Counterfeiting

Abstract Information security protection has a tremendous impact on human life, social stability and national security, leading to the rapid development of anti‐counterfeiting materials and related techniques. However, the traditional stored information on hard or dry media is often static and lacks functions, which makes it challenging to deal with increasing and powerful counterfeiting technologies. Modified intelligent polymeric gels exhibit color changes and shape morphing under external stimuli, which give them great potential for applications in information storage. This paper provides an overview of the latest progress in polymeric gel‐based information storage materials in relation to counterfeiting. Following a brief introduction of anti‐counterfeiting materials, the preparation methods for intelligent gels with adjustable colors (e.g., chemical colors and physical colors) and various encryption/decryption modes involving dimensions and diverse colors are outlined. Finally, the challenges and prospects for information storage and anti‐counterfeiting based on smart gels are discussed.