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Revisiting silk: a lens-free optical physical unclonable function

Author

Listed:
  • Min Seok Kim

    (Gwangju Institute of Science and Technology)

  • Gil Ju Lee

    (Gwangju Institute of Science and Technology
    Pusan National University)

  • Jung Woo Leem

    (Purdue University)

  • Seungho Choi

    (Yonsei University)

  • Young L. Kim

    (Purdue University
    Purdue Quantum Science and Engineering Institute)

  • Young Min Song

    (Gwangju Institute of Science and Technology
    Gwangju Institute of Science and Technology (GIST)
    Gwangju Institute of Science and Technology (GIST))

Abstract

For modern security, devices, individuals, and communications require unprecedentedly unique identifiers and cryptographic keys. One emerging method for guaranteeing digital security is to take advantage of a physical unclonable function. Surprisingly, native silk, which has been commonly utilized in everyday life as textiles, can be applied as a unique tag material, thereby removing the necessary apparatus for optical physical unclonable functions, such as an objective lens or a coherent light source. Randomly distributed fibers in silk generate spatially chaotic diffractions, forming self-focused spots on the millimeter scale. The silk-based physical unclonable function has a self-focusing, low-cost, and eco-friendly feature without relying on pre-/post-process for security tag creation. Using these properties, we implement a lens-free, optical, and portable physical unclonable function with silk identification cards and study its characteristics and reliability in a systemic manner. We further demonstrate the feasibility of the physical unclonable functions in two modes: authentication and data encryption.

Suggested Citation

  • Min Seok Kim & Gil Ju Lee & Jung Woo Leem & Seungho Choi & Young L. Kim & Young Min Song, 2022. "Revisiting silk: a lens-free optical physical unclonable function," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-021-27278-5
    DOI: 10.1038/s41467-021-27278-5
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    Cited by:

    1. Kun Wang & Jianwei Shi & Wenxuan Lai & Qiang He & Jun Xu & Zhenyi Ni & Xinfeng Liu & Xiaodong Pi & Deren Yang, 2024. "All-silicon multidimensionally-encoded optical physical unclonable functions for integrated circuit anti-counterfeiting," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Junfang Zhang & Rong Tan & Yuxin Liu & Matteo Albino & Weinan Zhang & Molly M. Stevens & Felix F. Loeffler, 2024. "Printed smart devices for anti-counterfeiting allowing precise identification with household equipment," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Ningfei Sun & Ziyu Chen & Yanke Wang & Shu Wang & Yong Xie & Qian Liu, 2023. "Random fractal-enabled physical unclonable functions with dynamic AI authentication," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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