Hardware-based security devices using a physical unclonable function created by the irregular grain boundaries found in perovskite calcium titanate

Subin Lee, Eun Kwang Lee, Byung Chul Jang, Hocheon Yoo

Research output: Contribution to journalArticlepeer-review

Abstract

The IoT era necessitated the need for hardware-based security devices due to their strong resistance to hacking compared to software-based systems, which are limited by CPU usage and performance. Hardware-based systems are more unpredictable due to their unique and non-discernible external properties. This research focused on developing a security device based on lead-free metal oxide CaTiO3 perovskite material with irregular electrical characteristics, known as physical unclonable functions. These irregularities were created by increasing the number of grain boundaries on the device surface through high-temperature annealing, resulting in greater adsorbed oxygen. The outcome was a highly random and unique security key using irregular electrical characteristics with 49.53% uniformity and a 46.55% inter-Hamming distance.

Original languageEnglish
Article number172329
JournalJournal of Alloys and Compounds
Volume969
DOIs
StatePublished - 25 Dec 2023

Keywords

  • Grain boundary
  • Hardware-based security system
  • Metal oxide
  • Perovskite
  • Physical Unclonable Function

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