International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: DFA on AES

Christophe Giraud
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Abstract: In this paper we describe two different DFA attacks on the AES. The first one uses a fault model that induces a fault on only one bit of an intermediate result, hence allowing us to obtain the key by using 50 faulty ciphertexts for an AES-128. The second attack uses a more realistic fault model: we assume that we may induce a fault on a whole byte. For an AES-128, this second attack provides the key by using less than 250 faulty ciphertexts. Moreover, this attack has been successfully put into practice on a smart card.
  title={DFA on AES},
  booktitle={IACR Eprint archive},
  keywords={AES, DFA, side-channel attacks, smartcards.},
  note={The first version of this paper was submitted in April 2002 to CHES'02. 12186 received 20 Jan 2003, last revised 14 May 2003},
  author={Christophe Giraud},