On the systematic drift of physically unclonable functions due to aging

André Schaller, Boris Škorić, Stefan Katzenbeisser

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

3 Citations (Scopus)

Abstract

In recent years Physically Unclonable Functions (PUFs) have been proposed as a promising building block for security related scenarios like key storage and authentication. PUFs are physical systems and as such their responses are inherently noisy, precluding a straightforward derivation of cryptographic key material from raw PUF measurements. To overcome this drawback, Fuzzy Extractors are used to eliminate the noise and guarantee robust outputs. A special type are Reverse Fuzzy Extractors, shifting the computational load of error correction towards a computationally powerful verifier. However, the Reverse Fuzzy Extractor reveals error patterns to any eavesdropper, which may cause privacy issues (if the PUF key is drifting, the error pattern is linkable to the identity) and even security problems (if the noise is data-dependent and multiple protocol transcripts can be linked to the same user). In this work we evaluate the effects of aging on popular PUF implementations and investigate its impact on the security properties of the Reverse Fuzzy Extractor.

Original languageEnglish
Title of host publicationTrustED 2015 - Proceedings of the 5th International Workshop on Trustworthy Embedded Devices, co-located with CCS 2015
PublisherAssociation for Computing Machinery, Inc
Pages15-20
Number of pages6
ISBN (Electronic)9781450338288
DOIs
Publication statusPublished - 16 Oct 2015
Event5th International Workshop on Trustworthy Embedded Devices, TrustED 2015 - Denver, United States
Duration: 16 Oct 2015 → …

Conference

Conference5th International Workshop on Trustworthy Embedded Devices, TrustED 2015
Country/TerritoryUnited States
CityDenver
Period16/10/15 → …

Keywords

  • Error correction
  • Information leakage
  • Physically unclonable functions

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