dc.contributor.authorCao, Yuan
dc.contributor.authorZhang, Le
dc.contributor.authorChang, Chip-Hong
dc.contributor.authorChen, Shoushun
dc.identifier.citationCao, Y., Zhang, L., Chang, C.-H., & Chen, S. (2015). A Low-Power Hybrid RO PUF With Improved Thermal Stability for Lightweight Applications. IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 34(7), 1143-1147.en_US
dc.description.abstractRing oscillator (RO) based physical unclonable function (PUF) is resilient against noise impacts, but its response is susceptible to temperature variations. This paper presents a low-power and small footprint hybrid RO PUF with a very high temperature stability, which makes it an ideal candidate for lightweight applications. The negative temperature coefficient of the low-power subthreshold operation of current starved inverters is exploited to mitigate the variations of differential RO frequencies with temperature. The new architecture uses conspicuously simplified circuitries to generate and compare a large number of pairs of RO frequencies. The proposed 9- stage hybrid RO PUF was fabricated using GF 65 nm CMOS technology. The PUF occupies only 250 m2 of chip area and consumes only 32.3 W per CRP at 1.2 V and 230 MHz. The measured average and worst-case reliability of its responses are 99.84% and 97.28%, respectively over a wide range of temperature from 40 to 120 ◦C.en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent5 p.en_US
dc.relation.ispartofseriesIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systemsen_US
dc.rights© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [http://dx.doi.org/10.1109/TCAD.2015.2424955].en_US
dc.subjectHardware securityen_US
dc.subjectPhysical unclonable function (PUF)
dc.subjectProcess variation
dc.subjectRing oscillator (RO)
dc.subjectTemperature stability
dc.titleA Low-Power Hybrid RO PUF With Improved Thermal Stability for Lightweight Applicationsen_US
dc.typeJournal Article
dc.contributor.researchEnergy Research Institute @NTU
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.description.versionAccepted versionen_US

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