Physical Unclonable Function Based on 3D‐NAND Flash Array Structure With Multi‐Chip Implementation
Hwiho Hwang, Sangwook Youn, Jinwoo Park, Dayeon Yu, Hyungjin Kim · 2026
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Description
Hwiho Hwang, Sangwook Youn, Jinwoo Park, Dayeon Yu, and Hyungjin Kim propose in 2026 a hardware fingerprint built inside a 3D NAND flash array. Physical unclonable functions turn random manufacturing variation into device identities that cannot be copied, but circuit based versions eat area and power. Their design reads the natural current differences among flash memory strings instead of writing to them, avoiding wear.
Each wordline acts as an independent fingerprint chip, and answers come from comparing summed string currents, so one array stacks many chips with a huge challenge space. Test arrays confirmed the current scatter, traced partly to grain boundaries in the silicon. A stacked implementation built from measured data scored near ideal on fingerprint quality metrics. It also passed all sixteen standard statistical randomness tests and machine learning attack simulations.
Catalog record
| CREATOR | Hwiho Hwang, Sangwook Youn, Jinwoo Park, Dayeon Yu, Hyungjin Kim |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 36412 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |