Estimation during Design Phases of Suitable SRAM Cells for PUF Applications Using Separatrix and Mismatch Metrics

Physically unclonable functions (PUFs) are used as low-cost cryptographic primitives in device authentication and secret key creation. SRAM-PUFs are well-known as entropy sources; nevertheless, due of non-deterministic noise environment during the power-up process, they are subject to low challenge-...

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Main Authors: Abdel Alheyasat, Gabriel Torrens, Sebastià A. Bota, Bartomeu Alorda
Format: Article
Language:English
Published: MDPI AG 2021-06-01
Series:Electronics
Subjects:
Online Access:https://www.mdpi.com/2079-9292/10/12/1479
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author Abdel Alheyasat
Gabriel Torrens
Sebastià A. Bota
Bartomeu Alorda
author_facet Abdel Alheyasat
Gabriel Torrens
Sebastià A. Bota
Bartomeu Alorda
author_sort Abdel Alheyasat
collection DOAJ
description Physically unclonable functions (PUFs) are used as low-cost cryptographic primitives in device authentication and secret key creation. SRAM-PUFs are well-known as entropy sources; nevertheless, due of non-deterministic noise environment during the power-up process, they are subject to low challenge-response repeatability. The dependability of SRAM-PUFs is usually accomplished by combining complex error correcting codes (ECCs) with fuzzy extractor structures resulting in an increase in power consumption, area, cost, and design complexity. In this study, we established effective metrics on the basis of the separatrix concept and cell mismatch to estimate the percentage of cells that, due to the effect of variability, will tend to the same initial state during power-up. The effects of noise and temperature in cell start-up processes were used to validate the proposed metrics. The presented metrics may be applied at the SRAM-PUF design phases to investigate the impact of different design parameters on the percentage of reliable cells for PUF applications.
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spelling doaj.art-631caa2705db483188b41786278dd5742023-11-22T00:51:08ZengMDPI AGElectronics2079-92922021-06-011012147910.3390/electronics10121479Estimation during Design Phases of Suitable SRAM Cells for PUF Applications Using Separatrix and Mismatch MetricsAbdel Alheyasat0Gabriel Torrens1Sebastià A. Bota2Bartomeu Alorda3Industrial and Construction Engineering Department, University of the Balearic Islands, 07120 Palma, SpainIndustrial and Construction Engineering Department, University of the Balearic Islands, 07120 Palma, SpainIndustrial and Construction Engineering Department, University of the Balearic Islands, 07120 Palma, SpainIndustrial and Construction Engineering Department, University of the Balearic Islands, 07120 Palma, SpainPhysically unclonable functions (PUFs) are used as low-cost cryptographic primitives in device authentication and secret key creation. SRAM-PUFs are well-known as entropy sources; nevertheless, due of non-deterministic noise environment during the power-up process, they are subject to low challenge-response repeatability. The dependability of SRAM-PUFs is usually accomplished by combining complex error correcting codes (ECCs) with fuzzy extractor structures resulting in an increase in power consumption, area, cost, and design complexity. In this study, we established effective metrics on the basis of the separatrix concept and cell mismatch to estimate the percentage of cells that, due to the effect of variability, will tend to the same initial state during power-up. The effects of noise and temperature in cell start-up processes were used to validate the proposed metrics. The presented metrics may be applied at the SRAM-PUF design phases to investigate the impact of different design parameters on the percentage of reliable cells for PUF applications.https://www.mdpi.com/2079-9292/10/12/1479SRAM cell characterizationreliability marginsmismatch metricsSRAM-PUFs
spellingShingle Abdel Alheyasat
Gabriel Torrens
Sebastià A. Bota
Bartomeu Alorda
Estimation during Design Phases of Suitable SRAM Cells for PUF Applications Using Separatrix and Mismatch Metrics
Electronics
SRAM cell characterization
reliability margins
mismatch metrics
SRAM-PUFs
title Estimation during Design Phases of Suitable SRAM Cells for PUF Applications Using Separatrix and Mismatch Metrics
title_full Estimation during Design Phases of Suitable SRAM Cells for PUF Applications Using Separatrix and Mismatch Metrics
title_fullStr Estimation during Design Phases of Suitable SRAM Cells for PUF Applications Using Separatrix and Mismatch Metrics
title_full_unstemmed Estimation during Design Phases of Suitable SRAM Cells for PUF Applications Using Separatrix and Mismatch Metrics
title_short Estimation during Design Phases of Suitable SRAM Cells for PUF Applications Using Separatrix and Mismatch Metrics
title_sort estimation during design phases of suitable sram cells for puf applications using separatrix and mismatch metrics
topic SRAM cell characterization
reliability margins
mismatch metrics
SRAM-PUFs
url https://www.mdpi.com/2079-9292/10/12/1479
work_keys_str_mv AT abdelalheyasat estimationduringdesignphasesofsuitablesramcellsforpufapplicationsusingseparatrixandmismatchmetrics
AT gabrieltorrens estimationduringdesignphasesofsuitablesramcellsforpufapplicationsusingseparatrixandmismatchmetrics
AT sebastiaabota estimationduringdesignphasesofsuitablesramcellsforpufapplicationsusingseparatrixandmismatchmetrics
AT bartomeualorda estimationduringdesignphasesofsuitablesramcellsforpufapplicationsusingseparatrixandmismatchmetrics