International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Secure and Efficient Masking of AES - A Mission Impossible?

Elisabeth Oswald
Stefan Mangard
Norbert Pramstaller
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Abstract: This document discusses masking approaches with a special focus on the AES S-box. Firstly, we discuss previously presented masking schemes with respect to their security and implementation. We conclude that algorithmic countermeasures to secure the AES algorithm against side-channel attacks have not been resistant against all first-order side-channel attacks. Secondly, we introduce a new masking countermeasure which is not only secure against first-order side-channel attacks, but which also leads to relatively small implementations compared to other masking schemes when implemented in dedicated hardware.
  title={Secure and Efficient Masking of AES - A Mission Impossible?},
  booktitle={IACR Eprint archive},
  keywords={implementation / AES, implementation, side channel attacks},
  note={ 12573 received 4 Jun 2004},
  author={Elisabeth Oswald and Stefan Mangard and Norbert Pramstaller},