Chapter

Cryptographic Hardware and Embedded Systems - CHES 2009

Volume 5747 of the series Lecture Notes in Computer Science pp 81-96

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

  • Emmanuel ProuffAffiliated withOberthur Technologies
  • , Robert McEvoyAffiliated withClaude Shannon Institute for Discrete Mathematics, Coding and Cryptography, University College Cork

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.

Keywords

Side-Channel Attacks Permutation Tables CPA MIA Masking