126278 20240731103357.0 doi 10.1109/OJIES.2023.3262871 sideral 133718 ART-2023-133718 eng Garcia-Bosque, Miguel Universidad de Zaragoza (orcid)0000-0001-8648-6248 Suitability of Generalized GAROs on FPGAs as PUFs or TRNGs considering spatial correlations 2023 Access copy available to the general public Unrestricted In the last years, guaranteeing the security in Internet of things communications has become an essential task. In this article, the bias of a wide set of oscillators has been studied to determine their suitability as both true random number generators (TRNGs) and physically unclonable functions (PUFs). For this purpose, a generic configurable structure has been proposed and implemented in an field programmable gate array (FPGA). With this implementation, by introducing some external signals it is possible to configure the system in different oscillator topologies. This way, we have managed to analyze 2730 oscillators composed by seven lookup tables (LUTs) without having to resynthesize the code each time. The performed analysis has included conventional ring oscillators, Galois ring oscillators, and newly proposed oscillator topologies. From this analysis, we have concluded that none of these oscillators behave as an ideal TRNG but ring oscillators present the closest to an ideal behavior. Regarding their suitability as PUFs, some of the newly proposed oscillators in this article present a high reproducibility, higher than that of conventional ring oscillator PUF (RO-PUF) and a high uniqueness. Furthermore, we have noticed that both their reproducibility and their uniqueness tend to improve when increasing the length of the oscillators, which opens the possibility of finding new oscillators with even better properties by studying oscillators of bigger lengths. Finally, by studying the spatial correlation of the bias of these oscillators, we have observed that they present a much lower spatial correlation compared to the ring oscillators, which opens the possibility of using these oscillators in PUF architectures that use more comparisons than typical RO-PUFs. info:eu-repo/grantAgreement/ES/AEI/PID2020-114110RA-I00 info:eu-repo/grantAgreement/ES/DGA/LMP197-21 nfo:eu-repo/grantAgreement/ES/UZ/CUD2021-02 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 1.813 2023 Control and Systems Engineering 2023 Q1 Industrial and Manufacturing Engineering 2023 Q1 Electrical and Electronic Engineering 2023 Q1 10.8 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Naya, Abel Universidad de Zaragoza Díez-Señorans, Guillermo Universidad de Zaragoza (orcid)0000-0001-9131-0861 Sánchez-Azqueta, Carlos Universidad de Zaragoza (orcid)0000-0002-8236-825X Celma, Santiago Universidad de Zaragoza (orcid)0000-0003-0182-7723 2002 385 Universidad de Zaragoza Dpto. Física Aplicada Área Física Aplicada 5008 250 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Electrónica 4 (2023), 112-122 IEEE open j. ind. electron. soc. IEEE Open Journal of the Industrial Electronics Society 2644-1284 1331928 http://zaguan.unizar.es/record/126278/files/texto_completo.pdf Versión publicada 2559922 http://zaguan.unizar.es/record/126278/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:126278 articulos driver 2024-07-31-09:57:25 ARTICLE