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

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.