Random Nanofracture‐Enabled Physical Unclonable Function

• DOI: 10.1002/admt.202001073
• Publication Date: 2021-04-21T23:40:36Z
• Authors: Taiping Zhang; Zhiwen Shu; Lijun Zhang; Yiqin Chen; Zhanyong Feng; Yueqiang Hu; Feng Huang; Pidong Wang; Dong Li; Yao Yao; Song Sun; Huigao Duan
• Keywords: Nanodot; Physical unclonable function; Hardware security module

Abstract Physical unclonable function (PUF) is promising for anticounterfeiting and security applications. In this paper, a PUF concept demonstrated based on the stochastic generation of nanodot matrix via mechanical stripping gold film kirigami with arrayed nanoscale split‐ring cuts. The random occurrence nanofracture metallic nanoconnection at parts results in unpredictable remaining (labeled as “1”) or peeling‐off “0”) nanodots each unit thus generates binary matrix. highest randomness, i.e., 50% matrix, can be achieved by tuning width nanoconnection. Mechanical modeling reveals that caused fracture‐related variations such effective strength adhesion. A quick response code (QR) retrieved analysis from dark field photograph generated nanofacture‐enabled using in‐house developed solver, demonstrating excellent unclonability, repeatability, uniformity. encoding capacity our PUFs conveniently scaled up down depending demands applications, which beneficial to advanced authentication identification systems high security.