## CryptoDB

### Paper: Provably Secure Higher-Order Masking of AES

Authors: Matthieu Rivain Emmanuel Prouff URL: http://eprint.iacr.org/2010/441 Search ePrint Search Google Implementations of cryptographic algorithms are vulnerable to Side Channel Analysis (SCA). To counteract it, masking schemes are usually involved which randomize key-dependent data by the addition of one or several random value(s) (the masks). When $d$th-order masking is involved (i.e. when $d$ masks are used per key-dependent variable), the complexity of performing an SCA grows exponentially with the order $d$. The design of generic $d$th-order masking schemes taking the order $d$ as security parameter is therefore of great interest for the physical security of cryptographic implementations. This paper presents the first generic $d$th-order masking scheme for AES with a provable security and a reasonable software implementation overhead. Our scheme is based on the hardware-oriented masking scheme published by Ishai et al. at Crypto 2003. Compared to this scheme, our solution can be efficiently implemented in software on any general-purpose processor. This result is of importance considering the lack of solution for $d\geq 3$.
##### BibTeX
@misc{eprint-2010-23342,
title={Provably Secure Higher-Order Masking of AES},
booktitle={IACR Eprint archive},
keywords={implementation /},
url={http://eprint.iacr.org/2010/441},
note={Full version of a paper published in the proceedings of CHES 2010. matthieu.rivain@gmail.com 14834 received 13 Aug 2010},
author={Matthieu Rivain and Emmanuel Prouff},
year=2010
}