Lensless and Optical Physically Unclonable Function with Fibrous Media

Physically unclonable functions (PUFs) are physical security systems cannot be easily replicated because the manufacturing process causes inherently uncontrollable random factor in same elements. The manufactured PUF acts as unique as a fingerprint. As a result, it is nearly impossible to replicate a sufficiently identical PUF. Therefore, PUF is a promising and reliable solution in hardware security, such as secure authentication, identification, and encryption key generation. The concept of PUF was first proposed as physical one-way functions in 2001 by R.S. Pappu [1] . Since then, various types of PUFs have been suggested, including optical-based PUF, magnetic-based PUF, electronics-based PUF, and RF-based PUF [2] . In particular, the optical PUF provides numerous challenge and response pair.