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Communication Dans Un Congrès Année : 2013

Software Camouflage

Sylvain Guilley
Marion Damien
DMI
Souissi Youssef
  • Fonction : Auteur
  • PersonId : 971834
Antoine Wurcker
  • Fonction : Auteur
DMI

Résumé

Obfuscation is a software technique aimed at protecting highvalue programs against reverse-engineering. In embedded devices, it is harder for an attacker to gain access to the program machine code; of course, the program can still be very valuable, as for instance when it consists in a secret algorithm. In this paper, we investigate how obscurity techniques can be used to protect a secret customization of substitution boxes in symmetric ciphers, when the sole information available by the attacker is a side-channel. The approach relies on a combination of a universal evaluation algorithm for vectorial Boolean functions with indistinguishable opcodes that are randomly shuffled. The promoted solution is based on the noting that different logic opcodes, such as AND/OR or AND/XOR, happen to be very close one from each other from a sidechannel leakage point of view. Moreover, our solution is very amenable to masking owing to the fact the substitution boxes are computed (combinationally).
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Dates et versions

hal-01218046 , version 1 (20-10-2015)

Identifiants

  • HAL Id : hal-01218046 , version 1

Citer

Sylvain Guilley, Marion Damien, Souissi Youssef, Antoine Wurcker. Software Camouflage. Foundations and Practice of Security -- FPS 2013, Oct 2013, La Rochelle, France. ⟨hal-01218046⟩
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