Physical Unclonable Functions

Counterfeiting has become a critical challenge in modern industries, causing economic losses and threatening security systems. Traditional PUF technologies often face limitations such as complex fabrication methods and vulnerabilities to replication. These challenges hinder their wide adoption in real-world applications. To address these concerns, we are developing innovative solutions in physically unclonable functions (PUFs). To overcome these obstacles, we have introduced two novel PUF technologies. The first utilizes a laser ablation technique to create random crater patterns on silicon-based materials. This method is rapid, cost-effective, and scalable, producing high-randomness tags ideal for authentication and encryption. The second innovation employs time-varying phosphorescent patterns based on MoS2 atomic seeds and organic phosphors. These 4D PUFs generate dynamic, unpredictable responses over time, offering enhanced security and countless unique challenge-response pairs. Our technologies provide practical solutions to existing limitations in PUF systems. They promise widespread applicability in anti-counterfeiting, IoT device authentication, and secure data encryption, paving the way for next-generation security technologies.