International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Blind Attacks on Engineering Samples

Vanessa Gratzer
David Naccache
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Abstract: In addition to its usual complexity assumptions, cryptography silently assumes that information can be physically protected in a single location. As we now know, real-life devices are not ideal and confidential information leaks through different physical channels.\smallskip Whilst most aspects of side channel leakage (cryptophthora) are now well understood, no attacks on totally unknown algorithms are known to date. This paper describes such an attack.\smallskip By {\sl totally unknown} we mean that no information on the algorithm's mathematical description (including the plaintext size), the microprocessor or the chip's power consumption model is available to the attacker.\smallskip We successfully experimented the attack on a commercially available device produced by a non-European smart-card manufacturer.
  title={Blind Attacks on Engineering Samples},
  booktitle={IACR Eprint archive},
  keywords={implementation / side channel attacks, DPA, cryptophthora},
  note={ 13145 received 28 Dec 2005},
  author={Vanessa Gratzer and David Naccache},