Designing Physical Unclonable Functions From Optically Active Materials

Area of Science:

• Materials Science
• Optoelectronics
• Security Engineering

Background:

• Physical unclonable functions (PUFs) provide unique hardware security features.
• Global counterfeiting necessitates robust authentication methods.
• Optical materials offer non-invasive, non-destructive readout capabilities for security applications.

Purpose of the Study:

• To review recent advancements in optical Physical unclonable function (PUF) device design.
• To highlight the potential of optically active materials in PUF applications.
• To provide a roadmap for next-generation optical PUF development.

Main Methods:

• Examination of resonant and non-resonant optical materials as security taggants.
• Analysis of material incorporation in PUF devices using non-deterministic fabrication.
• Review of design criteria, challenges, and opportunities in optical PUF development.

Main Results:

• Optical PUF devices leverage stochastic nano-/micro-patterns of optical inks.
• Chemically generated PUFs demonstrate excellent device performance.
• Various optical materials are suitable for security taggants in PUF devices.

Conclusions:

• Optical PUFs present a promising avenue for advanced anti-counterfeiting technologies.
• Further development of optical probes will enhance PUF security and reliability.
• Integration of optical materials and non-deterministic fabrication is key for future PUF designs.