Abstract
Physically unclonable functions (PUFs) are used for various applications such as anticounterfeiting, authentication, and secret key generation. They are generally evaluated through electrical measurements, requiring much time and effort due to the many electrical connections required. This study proposes an optical verification of spin-orbit torque (SOT) devices for PUF design. SOT devices have gained much attention because they resist degradation and thermal changes and can generate secret keys with high reproducibility. A simple optical method based on the magneto-optical Kerr effect is introduced to verify the authenticity of the proposed SOT PUF device. Furthermore, this study assesses the feasibility of using a W/CoFeB/MgO/Ta structure as a PUF. The 24-bit device shows a reliability of 97.8 ± 1.03%, making it a promising candidate for use as a spintronics-based PUFs.
Original language | English |
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Article number | 2300056 |
Journal | Advanced Electronic Materials |
Volume | 9 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2023 Jul |
Bibliographical note
Funding Information:This study was supported by the National Research Foundation (NRF) of Korea, funded by the Ministry of Science and ICT (2020M3F3A2A01082591 and 2022M3H4A1A04096339) and the Samsung Electronics Co., Ltd. (IO201211‐08104‐01).
Publisher Copyright:
© 2023 The Authors. Advanced Electronic Materials published by Wiley-VCH GmbH.
Keywords
- electronic devices
- magneto-optical Kerr effect
- physically unclonable functions
- reliability
- secret keys
- spin-orbit torque
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials