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Erschienen in:
2001 | OriginalPaper | Buchkapitel
An Implementation of DES and AES, Secure against Some Attacks
verfasst von : Mehdi-Laurent Akkar, Christophe Giraud
Erschienen in: Cryptographic Hardware and Embedded Systems — CHES 2001
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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Since Power Analysis on smart cards was introduced by Paul Kocher [7], many countermeasures have been proposed to protect implementations of cryptographic algorithms. In this paper we propose a new protection principle: the transformed masking method. We apply this method to protect two of the most popular block ciphers: DES and the AES Rijndael. To this end we introduce some transformed S-boxes for DES and a new masking method and its applications to the non-linear part of Rijndael.