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Related Experiment Video

Updated: Jun 26, 2025

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Robust Optical Physical Unclonable Function Based on Total Internal Reflection for Portable Authentication.

Zhiyuan Wang1,2,3, Hu Wang1,2,3, Pengxiang Wang1,2,3

  • 1Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, P. R. China.

ACS Applied Materials & Interfaces
|May 14, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a robust optical Physical Unclonable Function (PUF) using total internal reflection (TIR-PUF) and polymer microspheres. The novel TIR-PUF offers high security and environmental stability for portable authentication systems.

Keywords:
anticounterfeitingenvironmental stabilityphysical unclonable functionsportabilitytotal internal reflection

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Cryptography

Background:

  • Current optical Physical Unclonable Functions (PUFs) rely on materials with inherent robustness issues.
  • Manufacturing randomness is key for PUF-based cryptographic primitives.
  • There is a need for stable and reliable optical PUF solutions.

Purpose of the Study:

  • To develop an environmentally stable optical PUF using total internal reflection (TIR).
  • To enhance security and reliability for cryptographic applications.
  • To demonstrate the feasibility of portable authentication systems.

Main Methods:

  • Constructed a TIR-PUF by perturbing total internal reflection with randomly distributed polymer microspheres.
  • Optimized polymer solution concentration to improve bit uniformity and encoding capacity.
  • Developed an iterative binning procedure to transform response images into encoded keys.

Main Results:

  • Achieved high encoding capacity (2^370) and extremely low authentication error probability (1.614 × 10^-23).
  • Demonstrated excellent readout reliability with a low intra-Hamming distance (0.068).
  • Confirmed significant environmental stability under ultrasonic washing, high temperature, UV irradiation, and chemical exposure.

Conclusions:

  • The developed TIR-PUF offers superior environmental stability and security compared to existing optical PUFs.
  • The system's performance indicates suitability for practical, portable authentication applications.
  • This work paves the way for robust, low-power, and wireless authentication solutions.