First-Order Side-Channel Attacks on the Permutation Tables Countermeasure

  • Authors:
  • Emmanuel Prouff;Robert Mcevoy

  • Affiliations:
  • Oberthur Technologies, France;Claude Shannon Institute for Discrete Mathematics, Coding and Cryptography, University College Cork, Ireland

  • Venue:
  • CHES '09 Proceedings of the 11th International Workshop on Cryptographic Hardware and Embedded Systems
  • Year:
  • 2009

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Abstract

The use of random permutation tables as a side-channel attack countermeasure was recently proposed by Coron [5]. The countermeasure operates by ensuring that during the execution of an algorithm, each intermediate variable that is handled is in a permuted form described by the random permutation tables. In this paper, we examine the application of this countermeasure to the AES algorithm as described in [5], and show that certain operations admit first-order side-channel leakage. New side-channel attacks are developed to exploit these flaws, using correlation-based and mutual information-based methods. The attacks have been verified in simulation, and in practice on a smart card.