دورية أكاديمية

Improved Robustness against Magnetic Field in Spin–Orbit‐Torque‐Based Physical Unclonable Functions through Write‐Back Operation

التفاصيل البيبلوغرافية
العنوان: Improved Robustness against Magnetic Field in Spin–Orbit‐Torque‐Based Physical Unclonable Functions through Write‐Back Operation
المؤلفون: Daekyu Koh, Jaimin Kang, Taehwan Kim, Jisung Lee, Sujung Noh, Hansaem Lee, JoonHyun Kwon, Soogil Lee, Jongsun Park, Byong‐Guk Park
المصدر: Advanced Electronic Materials, Vol 9, Iss 4, Pp n/a-n/a (2023)
بيانات النشر: Wiley-VCH, 2023.
سنة النشر: 2023
المجموعة: LCC:Electric apparatus and materials. Electric circuits. Electric networks
LCC:Physics
مصطلحات موضوعية: physical unclonable functions, spin–orbit torque switching, spintronics, Electric apparatus and materials. Electric circuits. Electric networks, TK452-454.4, Physics, QC1-999
الوصف: Abstract Physical unclonable functions (PUFs), which exploit uncontrollable and unpredictable randomness of materials or devices, have been investigated as a hardware‐based security primitive owing to their robustness against adversarial attacks. Spin–orbit torque (SOT) switching is one of the promising techniques for PUF applications because it can provide randomness by the stochastic switching distribution of perpendicular magnetization. In this study, the improvement in the reliability of SOT‐based PUFs against external magnetic fields with write‐back operation (WBO) is demonstrated. A PUF consisting of 8 × 4 array Hall‐bar devices with a Ta/CoFeB/MgO structure is fabricated, where the random distribution of the SOT switching current serves as an entropy source. However, the information stored in the PUF is easily modified by the application of an external magnetic field. To improve the robustness against magnetic fields, a WBO is introduced that applies an additional current to saturate the magnetization in either the upward or downward direction depending on the magnetic state. As a result, the SOT‐based PUF maintains an entropy value close to unity under a magnetic field of up to the coercive field of the CoFeB layer. Furthermore, the WBO provides a digitalized output, which potentially reduces peripheral circuitry such as analog‐to‐digital converters.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2199-160X
العلاقة: https://doaj.org/toc/2199-160XTest
DOI: 10.1002/aelm.202201073
الوصول الحر: https://doaj.org/article/545f9b02d56d41a58ef9420a0e10a667Test
رقم الانضمام: edsdoj.545f9b02d56d41a58ef9420a0e10a667
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:2199160X
DOI:10.1002/aelm.202201073