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Nanoscale physical unclonable function labels based on block co-polymer self-assembly

Nanoscale physical unclonable function labels based on block co-polymer self-assembly
Kim, Jang HwanJeon, SuwanIn, Jae HyunNam, SeonhoJin, Hyeong MinHan, Kyu HyoYang, Geon GugChoi, Hee JaeKim, Kyung MinShin, JonghwaSon, Seung-WooKwon, Seok JoonKim, Bong HoonKim, Sang Ouk
Issued Date
Nature Electronics, v.5, no.7, pp.433 - 442
Hardware-based cryptography that exploits physical unclonable functions is required for the secure identification and authentication of devices in the Internet of Things. However, physical unclonable functions are typically based on anticounterfeit identifiers created from randomized microscale patterns or non-predictable fluctuations of electrical response in semiconductor devices, and the validation of an encrypted signature relies on a single-purpose method such as microscopy or electrical measurement. Here we report nanoscale physical unclonable function labels that exploit non-deterministic molecular self-assembly. The labels are created from the multilayer superpositions of metallic nanopatterns replicated from self-assembled block co-polymer nanotemplates. Due to the nanoscale dimensions and diverse material options of the system, physical unclonable functions are intrinsically difficult to replicate, robust for authentication and resistant to external disturbance. Multiple, independently operating keys—which use electrical resistance, optical dichroism or Raman signals—can be generated from a single physical unclonable function, offering millisecond-level validation speeds. We also show that our physical unclonable function labels can be used on a range of different surfaces including dollar bills, human hair and microscopic bacteria. © 2022, The Author(s).
Nature Publishing Group
Related Researcher
  • 김봉훈 Kim, Bong Hoon 로봇및기계전자공학과
  • Research Interests IoT Devices; Medical Devices; 3D Materials; Nanomaterials; Self-assembly
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Department of Robotics and Mechatronics Engineering Bonghoon Group 1. Journal Articles


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