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Nanoseed-based physically unclonable function for on-demand encryption.

Junhyuk Ahn1,2, Taesung Park1, Taewoo Kang3

  • 1Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea.

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|April 25, 2025
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Summary
This summary is machine-generated.

This study introduces novel nanoseed-based physically unclonable functions (PUFs) for secure, storage-free cryptography. These PUFs leverage optical and electrical randomness for virtually infinite on-demand key generation, enhancing hardware security.

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Area of Science:

  • Materials Science
  • Cryptography
  • Nanotechnology

Background:

  • Physically unclonable functions (PUFs) offer hardware-based security against information leakage.
  • Conventional PUFs face challenges balancing security with storage requirements.

Purpose of the Study:

  • To introduce nanoseed-based PUFs to overcome limitations of traditional PUFs.
  • To develop a storage-free, on-demand cryptographic system using novel randomness sources.

Main Methods:

  • Utilizing PbS quantum dots and Ag nanocrystals as nanoseeds for simultaneous optical and electrical randomness.
  • Implementing a unique on-demand cryptographic algorithm with a shuffling method.
  • Integrating the PUF system with smartphones for practical demonstration.

Main Results:

  • Achieved virtually infinite on-demand key generation capacity (>10^58741 per mm²).
  • Demonstrated near-ideal Hamming distance in uniqueness and randomness tests, confirming cryptographic efficacy.
  • Successfully implemented storage-free, on-demand PUFs on smartphones.

Conclusions:

  • Nanoseed-based PUFs provide a robust solution for secure, scalable, and user-friendly cryptography.
  • The proposed method overcomes the security-storage trade-off inherent in conventional PUFs.
  • This technology enables practical, hardware-based security for everyday devices.