Organic Current Mirror PUF for Improved Stability Against Device Aging
Organic Current Mirror PUF for Improved Stability Against Device Aging
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DOI：
10.1109/jsen.2020.2986077
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发表时间：
2020-07
影响因子：
4.3
通讯作者：
Zhaoxing Qin;Michihiro Shintani;K. Kuribara;Y. Ogasahara;Takashi Sato
中科院分区：
文献类型：
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作者：
Zhaoxing Qin;Michihiro Shintani;K. Kuribara;Y. Ogasahara;Takashi Sato
物理上不元件的功能（PUF）是硬件安全领域的重要原始功能。如果使用有机薄膜晶体管（OTFTS）制造PUF，则可以进一步扩展其应用。例子包括智能包装，证明了包含产品的真实性和有机传感器收集的信息的隐私保护。本文提出了可以在柔性基材上制造的有机电流镜PUF（OCM-PUF）。拟议的OCM-PUF适应了当前的镜像结构，以实现OTFTS设备性能降解的自我补偿，这在大多数有机材料中是不可避免的。使用低电源电压OTFT设计了两种类型的OCM-PUF，以评估指标为PUF。制造的OCM-PUF在几周内保持了近95％的可靠性，从而表明拟议的PUF对设备衰老引起的响应变化具有很高的公差。
Physically unclonable functions (PUFs) are important primitives in the field of hardware security. Their applications can be further broadened if PUFs are fabricated using organic thin-film transistors (OTFTs). Examples include smart packaging that proves authenticity of a contained product and privacy protection for information gathered by organic sensors. This paper proposes an organic current mirror PUF (OCM-PUF) that can be fabricated on a flexible substrate. The proposed OCM-PUF adapts a current mirror structure to achieve self-compensation of the device performance degradation of OTFTs, which is unavoidable in most organic materials. Two types of OCM-PUFs were designed using a low supply voltage OTFT to evaluate the metrics as a PUF. The fabricated OCM-PUFs maintained a reliability of nearly 95% over few weeks, thereby showing that the proposed PUF achieved a high tolerance against response changes caused by device aging.