Vorrichtung mit Physikalisch Unklonbarer Funktion und Vorrichtung zur Erzeugung eines Kryptografischen Schlüssels damit

Details

Veröffentlichungs-Nr.

EP4800540

Anmeldetag

19. Dezember 2025

Veröffentlichung

2. September 2026

Rechtsraum

EP

IPC

G06F7/58, G09C1/00, H04L9/08

Abstract

Disclosed are a physically unclonable function device and a cryptographic key generation apparatus using the same. More particularly, a physically unclonable function device according to an embodiment of the present disclosure includes a spin-torque generating layer; a magnetic free layer; a tunnel barrier layer; a spacer layer; and an indirect exchange interaction layer, wherein the spin-torque generating layer generates a Spin-Orbit Torque (SOT) when a current flows in an in-plane direction, the magnetic free layer has Perpendicular Magnetic Anisotropy (PMA), and the indirect exchange interaction layer includes a first magnetic layer, a non-magnetic intermediate layer, and a second magnetic layer, wherein a magnetization direction between the first magnetic layer and the second magnetic layer is determined to be a parallel or antiparallel state according to the thickness of the non-magnetic intermediate layer, and when the magnetization direction of the indirect exchange interaction layer is the antiparallel state, stray magnetic fields of the first and second magnetic layers cancel each other out so that switching of the magnetic free layer does not occur, and when the magnetization direction of the indirect exchange interaction layer is the parallel state, the stray magnetic fields reinforce each other so that switching of the magnetic free layer occurs.

Anmelder

Firma

Korea University Research and Business Foundation

Land

🇰🇷 Südkorea

Fachgebiete