Contribution of MEMS to Physical Unclonable Functions (PUFs): Random Configuration of PDMS Nano-Structure for Optical PUF

• Main Authors: Chung, Myung-Kun, Kim, Min-Uk, Han, Jong-Woo, Yang, Jae-Soon, Kim, Beom-Jun, Jo, Min-Seung, Jung, Se-Yoon, Kim, Sung-Ho, Yoon, Jun-Bo
• Format: Conference Proceeding
• Language: English
• Subjects: Anti-counterfeiting; Authentication; Encoding; Mass production; Micromechanical devices; Nano-structure; Optical device fabrication; Physical unclonable function; Security
• ISSN: 2160-1968
• DOI: 10.1109/MEMS58180.2024.10439354

Physical unclonable functions (PUFs) are next-generation anti-counterfeiting technologies that leverage random patterns generated during a manufacturing process to create inherently random and non-reproducible security keys. Optical PUFs, a type of PUF, utilize light interaction with nano-materials to create random patterns that serve as robust security keys. However, current optical PUFs using nano-materials are susceptible to production limitations, high costs, and limited encoding capacity. This paper presents MEMS-fabricated nano-structures as a promising alternative to nano-materials to address these limitations. Employing MEMS fabrication technology enables the cost-effective mass production of random nano-patterns across large areas while enhancing encoding capacity. The results of this study indicate that MEMS technologies can make significant contributions to PUF.