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All-Optical Reconfigurable Physical Unclonable Function for Sustainable Security.

Jang-Kyun Kwak1, Changgyun Moon2, Hyun-Bin Yu1

  • 1School of Chemical Engineering, Sungkyunkwan University, Suwon-Si, Gyeonggi-do, Republic of Korea.

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Summary
This summary is machine-generated.

This study introduces an all-optical reconfigurable physical unclonable function (PUF) for sustainable hardware security. The novel system uses light to create and reconfigure PUFs, offering enhanced security and anti-counterfeiting capabilities.

Keywords:
gold nanoparticleslaser sinteringnanofabricationnanopatterningphysical unclonable functions

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Area of Science:

  • Hardware Security
  • Nanotechnology
  • Optics

Background:

  • Static physical unclonable functions (PUFs) face limitations in sustainable security due to evolving threats.
  • Existing reconfigurable PUF methods often rely on thermal treatments, posing challenges in thermal stability and scalability.
  • There is a growing demand for dynamic and reconfigurable PUF systems for enhanced, sustainable security.

Purpose of the Study:

  • To present an all-optical reconfigurable PUF system overcoming the limitations of static and thermally-treated PUFs.
  • To introduce a non-invasive and scalable optical technique for fabricating and reconfiguring PUFs.
  • To demonstrate the potential of optical PUFs for sustainable hardware security and anti-counterfeiting applications.

Main Methods:

  • Developed a nanopatterning method using plasmonic coupling-induced sintering of optically trapped gold nanoparticles (AuNPs) to fabricate optical PUFs.
  • Leveraged complex spatiospectral information for PUF security and encoding.
  • Implemented a lightweight authentication protocol for validating anti-counterfeiting and traceability applications.
  • Utilized optothermal nudging for irreversible, on-demand reconfiguration of patterned AuNPs.

Main Results:

  • The fabricated optical PUFs demonstrated practically sufficient security and outstanding encoding density.
  • The system exhibited robust resistance against machine learning-based modeling attacks.
  • The authentication protocol showed reliable performance for anti-counterfeiting and traceability.
  • On-demand reconfiguration enabled repeated generation of unpredictable and independent PUF responses.

Conclusions:

  • The all-optical reconfigurable PUF system offers a promising pathway toward sustainable hardware-based security.
  • The non-invasive, scalable optical approach addresses the limitations of previous PUF technologies.
  • The demonstrated capabilities highlight the potential for advanced anti-counterfeiting and traceability solutions.