Data-Dependent Delays as a Barrier Against Power Attacks

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31 Scopus citations


Power analysis attacks utilize the correlation between the dissipated power and the processed data. Although the instantaneous power dissipation contains information it cannot be exploited without full reverse engineering. This article explores data-dependent instantaneous (intra-cycle) power dissipation and shows that it can be used as additional source of randomness that can be utilized as a barrier against power analysis attacks. Noiseless circuit simulations conducted on 65 nm standard CMOS and standard-cell-based dual-rail SBOXs show that large data-dependent variance in propagation delays enhance the immunity of the circuits.

Original languageEnglish
Article number7166411
Pages (from-to)2069-2078
Number of pages10
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Issue number8
StatePublished - 1 Aug 2015

Bibliographical note

Publisher Copyright:
© 2015 IEEE.


  • Countermeasures
  • cryptography
  • data-dependent delay
  • dual-rail
  • intra-cycle
  • power analysis


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