Soft Response Generation and Thresholding Strategies for Linear and Feed-Forward MUX PUFs

Chen Zhou, Saroj Satapathy, Yingjie Lao, Keshab K. Parhi, Chris H. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Scopus citations

Abstract

In this work, we present probability based response generation schemes for MUX based Physical Unclonable Functions (PUFs). Compared to previous implementations where temporal majority voting (TMV) based on limited samples and coarse criteria was utilized to determine final responses, our design can collect soft responses with detailed probability information using simple on-chip circuits. Thresholds with fine accuracy are applied to efficiently distinguish stable and unstable challenge response pairs (CRPs). A 32nm test chip including both linear and feed-forward MUX PUFs was implemented for concept verification. Based on a detailed analysis of the hardware data, we propose several enhanced thresholding strategies for determining stable CRPs. For instance, a stringent threshold can be imposed in enrollment phase for selecting good CRPs, while a relaxed threshold can be used during normal authentication phase. Experimental data shows a high degree of uniqueness and randomness in the PUF responses which can be attributed to the carefully optimized circuit layout. Finally, output characteristic of a feed-forward MUX PUF was compared to that of a standard linear MUX PUF from the same 32nm chip.

Original languageEnglish (US)
Title of host publicationISLPED 2016 - Proceedings of the 2016 International Symposium on Low Power Electronics and Design
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages124-129
Number of pages6
ISBN (Electronic)9781450341851
DOIs
StatePublished - Aug 8 2016
Event21st IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2016 - San Francisco, United States
Duration: Aug 8 2016Aug 10 2016

Publication series

NameProceedings of the International Symposium on Low Power Electronics and Design
ISSN (Print)1533-4678

Other

Other21st IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2016
CountryUnited States
CitySan Francisco
Period8/8/168/10/16

Bibliographical note

Funding Information:
This research has been supported by the National Science Foundation under grant number CNS-1441639 and the semiconductor research corporation under contract number 2014-TS-2560.

Publisher Copyright:
© 2016 ACM.

Keywords

  • MUX based PUF
  • Physical unclonable function
  • feed-forward
  • massive statistics
  • soft response
  • thresholding

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