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Multilevel States of Nano‐Electromechanical Switch for a PUF‐Based Security Device
Author(s) -
Hwang KyuMan,
Kim WuKang,
Jin Ik Kyeong,
Lee SeungWook,
Choi YangKyu
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201803825
Subject(s) - stiction , physical unclonable function , materials science , footprint , key (lock) , encryption , nanowire , nanotechnology , nano , silicon , key generation , optoelectronics , computer science , microelectromechanical systems , computer network , composite material , paleontology , computer security , biology
A nano‐electromechanical (NEM) switch using multilevel states based on the high security physical unclonable function (PUF) is proposed and experimentally demonstrated. Using the asymmetric random stiction of a silicon nanowire (SiNW), the conventional binary state is simply expanded to a quaternary‐state encryption key without increasing chip area. The multiple states are determined by the asymmetrically bent direction and stiction of the SiNW. The experimental results show that the fabricated NEM‐PUF with multistates retains unique, random, and robust characteristics, while the key capacity is doubled, even with the same array size footprint.