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Summary
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This study introduces novel anticounterfeiting labels using gap-enhanced Raman tags (GERTs) as physical unclonable functions (PUFs). These labels offer high-dimensional encoding and robust authentication, presenting a secure solution against product counterfeiting.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Information Security

Background:

  • Anticounterfeiting measures are crucial for product authenticity.
  • Physical unclonable functions (PUFs) offer inherent security due to their unique physical properties.
  • Gap-enhanced Raman tags (GERTs) provide strong signal enhancement and photostability for reliable labeling.

Purpose of the Study:

  • To develop and demonstrate a novel PUF-based anticounterfeiting label using GERTs.
  • To achieve high-capacity data encoding and robust authentication for anti-counterfeiting applications.
  • To validate the practical viability and security of the proposed GERT-PUF system.

Main Methods:

  • Fabrication of PUF labels by drop-casting aqueous GERTs.
  • High-speed readout using a confocal Raman spectroscopy system.
  • Digitization via coarse-grained coding and authentication through pixel-by-pixel comparison.

Main Results:

  • Demonstrated a PUF label with a 3D encoding capacity exceeding 3 × 10^15051.
  • Achieved high mapping resolution (2500 pixels) with quaternary encoding of Raman intensity.
  • Authentication experiments confirmed the system's robustness, security, and practical viability.

Conclusions:

  • The developed GERT-based PUF labels offer a highly secure and scalable solution for anticounterfeiting.
  • This technology provides a potential platform for creating unbreakable anticounterfeiting systems.
  • The combination of GERTs and PUF principles opens new avenues in product security and authentication.