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Researchers developed a novel 3D "bionic" fluorescent physically unclonable function (PUF) label inspired by clouds. This innovative PUF label enhances security and encoding capacity, offering a cost-effective anti-counterfeiting solution.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Traditional 2D fluorescent PUF labels face limitations in coding capacity.
  • Developing secure and cost-effective anti-counterfeiting solutions is crucial.
  • Mimicking natural structures can inspire novel material designs.

Purpose of the Study:

  • To propose a novel 3D "bionic" fluorescent physically unclonable function (PUF) label.
  • To enhance the coding capacity and security of PUF labels.
  • To develop a cost-effective PUF label with a minimalist preparation process.

Main Methods:

  • Utilized Eu(CCA)3(H2O)2 powder with a unique secondary building unit as the fluorescent material.
  • Preserved the 3D morphology of the fluorescent material in resin to mimic cloud-like structures.
  • Employed experimental tests and first-principles calculations to elucidate luminescent properties.
  • Proposed a dual challenge-response system model (shallow and deep) to overcome coding limitations.

Main Results:

  • Successfully created a 3D "bionic" fluorescent PUF label with cloud-like structures.
  • Demonstrated enhanced encoding capacity from 2^10x10 to 2^100x10000 for a 10x10 pixel binary code.
  • Achieved a balance between simple PUF label usage and significantly enhanced label security.

Conclusions:

  • The proposed 3D "bionic" fluorescent PUF label offers a promising solution for anti-counterfeiting applications.
  • The minimalist preparation process and enhanced security pave the way for widespread adoption of 3D PUF labels.
  • This work provides new insights into the design and application of advanced PUF security features.