Digitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security

Since the discovery of the physical random functions and their subsequent refinement into physical unclonable functions (PUF), a great effort has been made in developing and characterizing these objects attending to their physical properties as well as conceiving a myriad of different examples in th...

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Autores principales:	Guillermo Diez-Senorans, Miguel Garcia-Bosque, Carlos Sanchez-Azqueta, Santiago Celma
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Compensated measuring entropy FPGA hardware security physically unclonable function ring oscillator Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/8bdef7a2a039496fbfedd41fed23e9d7
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spelling	oai:doaj.org-article:8bdef7a2a039496fbfedd41fed23e9d72021-11-18T00:04:10ZDigitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security2169-353610.1109/ACCESS.2021.3123867https://doaj.org/article/8bdef7a2a039496fbfedd41fed23e9d72021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9591584/https://doaj.org/toc/2169-3536Since the discovery of the physical random functions and their subsequent refinement into physical unclonable functions (PUF), a great effort has been made in developing and characterizing these objects attending to their physical properties as well as conceiving a myriad of different examples in the search for a better application-specificity and suitability. However, comparatively little time has been devoted to the analysis of entropy extraction algorithms beyond the recognition of some limitations due to the environment influencing the PUF behavior. In this article we focus on well known PUF candidates based on ring oscillator delay, which are ideal for FPGA prototyping due to their tolerance to asymmetries in routing. We have studied the impact that different digitization algorithms of the responses have over their security properties. Specifically, we have analyzed the response probability distributions that arise from some popular techniques of digitization called “compensated measuring” methods, highlighting their lack of uniformity and how this might translate into cryptanalytically exploitable vulnerabilities. Furthermore, we propose a new family of digitization schemes named <italic>k-modular</italic> that exhibit both uniformity in response distribution and high entropy density on both physical and response space.Guillermo Diez-SenoransMiguel Garcia-BosqueCarlos Sanchez-AzquetaSantiago CelmaIEEEarticleCompensated measuringentropyFPGAhardware securityphysically unclonable functionring oscillatorElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 147343-147356 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Compensated measuring entropy FPGA hardware security physically unclonable function ring oscillator Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Compensated measuring entropy FPGA hardware security physically unclonable function ring oscillator Electrical engineering. Electronics. Nuclear engineering TK1-9971 Guillermo Diez-Senorans Miguel Garcia-Bosque Carlos Sanchez-Azqueta Santiago Celma Digitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security
description	Since the discovery of the physical random functions and their subsequent refinement into physical unclonable functions (PUF), a great effort has been made in developing and characterizing these objects attending to their physical properties as well as conceiving a myriad of different examples in the search for a better application-specificity and suitability. However, comparatively little time has been devoted to the analysis of entropy extraction algorithms beyond the recognition of some limitations due to the environment influencing the PUF behavior. In this article we focus on well known PUF candidates based on ring oscillator delay, which are ideal for FPGA prototyping due to their tolerance to asymmetries in routing. We have studied the impact that different digitization algorithms of the responses have over their security properties. Specifically, we have analyzed the response probability distributions that arise from some popular techniques of digitization called “compensated measuring” methods, highlighting their lack of uniformity and how this might translate into cryptanalytically exploitable vulnerabilities. Furthermore, we propose a new family of digitization schemes named <italic>k-modular</italic> that exhibit both uniformity in response distribution and high entropy density on both physical and response space.
format	article
author	Guillermo Diez-Senorans Miguel Garcia-Bosque Carlos Sanchez-Azqueta Santiago Celma
author_facet	Guillermo Diez-Senorans Miguel Garcia-Bosque Carlos Sanchez-Azqueta Santiago Celma
author_sort	Guillermo Diez-Senorans
title	Digitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security
title_short	Digitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security
title_full	Digitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security
title_fullStr	Digitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security
title_full_unstemmed	Digitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security
title_sort	digitization algorithms in ring oscillator physically unclonable functions as a main factor achieving hardware security
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/8bdef7a2a039496fbfedd41fed23e9d7
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Digitization Algorithms in Ring Oscillator Physically Unclonable Functions as a Main Factor Achieving Hardware Security

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