Implementation of Ring Oscillators Based Physical Unclonable Functions with Independent Bits in the Response - Archive ouverte HAL Access content directly
Journal Articles International Journal of Reconfigurable Computing Year : 2012

Implementation of Ring Oscillators Based Physical Unclonable Functions with Independent Bits in the Response

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Abstract

The paper analyzes and proposes some enhancements of Ring Oscillators based Physical Unclonable Functions (PUFs). PUFs are used to extract a unique signature of an integrated circuit in order to authenticate a device and/or to generate a key. We show that designers of RO PUFs implemented in FPGAs need a precise control of placement and routing and an appropriate selection of ROs pairs to get independents bits in the PUF response. We provide a method to identify which comparisons are suitable when selecting pairs of ROs. Dealing with power consumption, we propose a simple improvement that reduces the consumption of the PUF published by Suh et al. in 2007 by up to 96.6%. Last but not least, we point out that ring oscillators significantly influence one another and can even be locked. This questions the reliability of the PUF and should be taken into account during the design.
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Dates and versions

ujm-00667692 , version 1 (08-02-2012)

Identifiers

  • HAL Id : ujm-00667692 , version 1

Cite

Florent Bernard, Viktor Fischer, Crina Costea, Robert Fouquet. Implementation of Ring Oscillators Based Physical Unclonable Functions with Independent Bits in the Response. International Journal of Reconfigurable Computing, 2012, 2012, Article ID 168961, 11 p. ⟨ujm-00667692⟩
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