Reconfigurable Electronic Physically Unclonable Functions Based on Organic Thin-Film Transistors with Multiscale Polycrystalline Entropy for Highly Secure Cryptography Primitives

Dongyoung Kim; Seongil Im; Danbi KimHanna LeeChangsoon ChoiJeong Ho ChoHyunsu JuJung Ah Lim

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Reconfigurable Electronic Physically Unclonable Functions Based on Organic Thin-Film Transistors with Multiscale Polycrystalline Entropy for Highly Secure Cryptography Primitives

机译：Reconfigurable Electronic Physically Unclonable Functions Based on Organic Thin-Film Transistors with Multiscale Polycrystalline Entropy for Highly Secure Cryptography Primitives

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In this study, organic thin-film transistors (OTFTs) are investigated as a promisingplatform for cost-effective, reconfigurable, and strong electronic physicallyunclonable functions (PUFs) for highly secure cryptography primitives. Simplespin-casting of solution-processable small-molecule organic semiconductorsforms unique and unclonable fingerprint thin films with randomly distributedpolycrystalline structures ranging from nanoscale molecular orientations tomicrocrystalline orientations, which provides a stochastic entropy source ofdevice-to-device variations for OTFT arrays. Blending organic semiconductorswith polymer materials is a promising strategy to improve the reliability ofOTFT-based PUFs. Studies on the relationship between the phase-separatedpolycrystalline microstructure of organic semiconductor/polymer blend filmsand PUF characteristics reveal that the 2D mosaic microcrystalline structure oforganic semiconductors in the vertically phase-separated trilayered structureenables the implementation of OTFT-based PUFs that simultaneously satisfythe requirements of being unclonable and unpredictable, with reliable cryptographicproperties. The inherent multiscale randomness of the crystallinestructure allows random distribution in OTFT-based PUFs even with variouschannel dimensions. The secret bit stream generated from the OTFT-basedPUF developed in this study is reconfigurable by simply changing the gate bias,demonstrating the potential to counter evolving security attack threats.

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来源
《Advanced functional materials》 |2023年第11期|2210367.1-2210367.12|共12页
作者
Dongyoung Kim; Seongil Im; Danbi KimHanna LeeChangsoon ChoiJeong Ho ChoHyunsu JuJung Ah Lim;
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Center for Opto-Electronic Materials and DevicesKorea Institute of Science and Technology (KIST)Seoul 02792, Republic of Korea Division of Nano and Information TechnologyUniversity of Science and Technology of KoreaDaejeon 34113, Republic of Korea;

Center for Opto-Electronic Materials and DevicesKorea Institute of Science and Technology (KIST)Seoul 02792, Republic of Korea Department of Chemical and Biomolecular EngineeringYonsei UniversitySeoul 03722, Republic of Korea;

Center for Opto-Electronic Materials and DevicesKorea Institute of Science and Technology (KIST)Seoul 02792, Republic of KoreaDepartment of Chemical and Biomolecular EngineeringYonsei UniversitySeoul 03722, Republic of Korea;

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encryption; organic semiconductors; organic thin-film transistors; physically unclonable functions; polymer blends;

Reconfigurable Electronic Physically Unclonable Functions Based on Organic Thin-Film Transistors with Multiscale Polycrystalline Entropy for Highly Secure Cryptography Primitives

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