Design of Resistor-Capacitor Physically Unclonable Function for Resource-Constrained IoT Devices

Keeping IoT devices secure has been a major challenge recently. One of the possible solutions to secure IoT devices is to use a physically unclonable function (PUF). A PUF is a security primitive that can generate device-specific cryptographic information by extracting the features of hardware uncer...

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Published inSensors (Basel, Switzerland) Vol. 20; no. 2; p. 404
Main Authors Lee, Sangjae, Oh, Mi-Kyung, Kang, Yousung, Choi, Dooho
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 10.01.2020
MDPI
Subjects
Capacitors
Circuits
Embedded systems
hardware security
iot
Low cost
Manufacturing
passive component
Passive components
Performance evaluation
physically unclonable function
RC circuits
resistor-capacitor
Resistors
Semiconductors
hardware security
passive component
resistor-capacitor
IoT
physically unclonable function
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Summary:Keeping IoT devices secure has been a major challenge recently. One of the possible solutions to secure IoT devices is to use a physically unclonable function (PUF). A PUF is a security primitive that can generate device-specific cryptographic information by extracting the features of hardware uncertainty. Because PUF instances are very difficult to replicate even by the manufacturer, the generated bit sequence can be used as cryptographic keys or as a unique identifier for the device. Regarding the implementation of PUF, the majority of PUFs introduced over the past decade are in the form of active components and have been implemented as separate chips or embedded as a part of a chip, making it difficult to use them in low-cost IoT devices due to cost and design flexibility. One approach to easily adopt PUFs in resource-constrained IoT devices is to use passive components such as resistors and capacitors (RC) that can be configured at low cost. The main feature of this RC-based PUF is that it extracts the small difference caused by charging and discharging of RC circuits and uses it as a response. In this paper, we extend the previous research and show the possibility to secure IoT devices by using the RC-based PUF.
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This paper is an extended version of our paper published in: Lee, S.; Oh, M.; Kang, Y.; Choi, D. RC PUF: A Low-Cost and an Easy-to-Design PUF for Resource-Constrained IoT Devices. In Proceedings of the 20th World Conference on Information Security Applications, Jeju, Koera, 21–24 August 2019; pp. 326–337.
ISSN:1424-8220
1424-8220
DOI:10.3390/s20020404