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Time-Division Multiplexing Physical Unclonable Functions Based on Multicolor Phosphorescent Carbon Dots.

Chao Li1,2, Fuhang Jiao3,4, Lin Dong3

  • 1Zhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou, 450001, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|April 14, 2025
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Summary

This study introduces a novel time-division multiplexing physical unclonable function (TDM-PUF) label using multicolor phosphorescent carbon dots for advanced information encryption. This innovative approach enhances security through time-resolved, multidimensional cryptographic protocols, offering superior anti-counterfeiting capabilities.

Keywords:
advanced encryptioncarbon dotsphosphorescent materialsphysical unclonable functiontime‐division multiplexing

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Cryptography

Background:

  • Phosphorescent materials offer high signal-to-noise ratios for information encryption.
  • Fixed phosphorescent patterns are susceptible to imitation, limiting their security.
  • Advanced encryption requires dynamic and complex anti-counterfeiting measures.

Purpose of the Study:

  • To develop a time-division multiplexing physical unclonable function (TDM-PUF) label for enhanced information encryption.
  • To leverage multicolor phosphorescent carbon dots (CDs) for time-resolved, multidimensional cryptographic protocols.
  • To create a robust anti-counterfeiting solution resistant to mimicry attacks.

Main Methods:

  • Synthesized multicolor phosphorescent carbon dots (CDs) by enhancing intersystem crossing and suppressing non-radiative transitions.
  • Engineered CDs for regulated emission spectra via energy transfer.
  • Implemented a TDM-PUF system utilizing wavelength and lifetime variations of CDs for time-resolved encryption.

Main Results:

  • Achieved efficient multi-color phosphorescence in CDs with enhanced luminescence properties.
  • Demonstrated a PUF system with random spatial distribution and unpredictable emissions for increased complexity.
  • Successfully implemented time-resolved anti-counterfeiting with multiple optical responses at specific time nodes.
  • Enabled highly secure time-division multiplexed encryption through segmented multicolor and multi-time channels.

Conclusions:

  • The developed TDM-PUF label offers a competitive anti-counterfeiting solution with enhanced security features.
  • The use of multicolor phosphorescent CDs provides a novel platform for multidimensional cryptographic protocols.
  • This research inspires the development of advanced, time-resolved anti-counterfeiting strategies.