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A Printed Camouflaged Cell Against Reverse Engineering of Printed Electronics Circuits

机译:打印伪装电池,防止印刷电子电路逆向工程

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摘要

Printed electronics (PE) enables disruptive applications in wearables, smart sensors, and healthcare since it provides mechanical flexibility, low cost, and on-demand fabrication. The progress in PE raises trust issues in the supply chain and vulnerability to reverse engineering (RE) attacks. Recently, RE attacks on PE circuits have been successfully performed, pointing out the need for countermeasures against RE, such as camouflaging. In this article, we propose a printed camouflaged logic cell that can be inserted into PE circuits to thwart RE. The proposed cell is based on three components achieved by changing the fabrication process that exploits the additive manufacturing feature of PE. These components are optically look-alike, while their electrical behaviors are different, functioning as a transistor, short, and open. The properties of the proposed cell and standard PE cells are compared in terms of voltage swing, delay, power consumption, and area. Moreover, the proposed camouflaged cell is fabricated and characterized to prove its functionality. Furthermore, numerous camouflaged components are fabricated, and their (in)distinguishability is assessed to validate their optical similarities based on the recent RE attacks on PE. The results show that the proposed cell is a promising candidate to be utilized in camouflaging PE circuits with negligible overhead.
机译:印刷电子设备(PE)可以在可穿戴设备,智能传感器和医疗保健中进行中断应用,因为它提供机械灵活性,低成本和按需制造。 PE的进度提高了供应链和易受攻击工程(重新)攻击的漏洞的信任问题。最近,已经成功地进行了对PE电路的再攻击,指出对RE的对策,例如伪装的需求。在本文中,我们提出了一种印刷的伪装逻辑单元,可以插入PE电路中以阻止RE。所提出的电池基于通过改变利用PE的添加剂制造特征的制造过程来实现的三种组分。这些组件是光学看起来相似的,而它们的电能是不同的,用作晶体管,短,打开。在电压摆动,延迟,功耗和面积方面比较所提出的细胞和标准PE细胞的性质。此外,所提出的伪装电池被制成并表征以证明其功能。此外,制造了许多伪装的部件,并且评估其(In)的区分性以基于最近对PE的攻击来验证它们的光学相似度。结果表明,该电池是在伪装PE电路中使用的有希望的候选者,其开销可忽略不计。

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