Paper 2007/443
Template Attacks with a Power Model
Moulay Abdelaziz EL AABID, Sylvain GUILLEY, and Philippe HOOGVORST
Abstract
This article analyses some properties of the \emph{template attack}. Examples come from attacks against an unprotected ASIC implementation of DES. The principal components analysis (PCA) is used to represent the templates in two dimensions. We give a physical interpretation of the templates PCA eigenvalues and eigenvectors. We show that the S-boxes are \emph{not} the target of template attacks. We point out that the efficiency of template attacks on unprotected implementations can be unleashed by using a power model. The most suitable power-model happens to be linked to the key schedule. This casts a new light on key schedule requirements for SCA resistance against a ``template'' attacker. The results are tailored for DES, because this symmetric block cipher is emblematic and is still promised a long life. Its key schedule is also remarkably simple, with cryptanalytic weaknesses,that paradoxically turn out to be a strength against SCA.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Template attacksprincipal component analysisside-channel attack
- Contact author(s)
- elaabid @ enst fr
- History
- 2007-12-06: last of 2 revisions
- 2007-12-05: received
- See all versions
- Short URL
- https://ia.cr/2007/443
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2007/443,
author = {Moulay Abdelaziz EL AABID and Sylvain GUILLEY and Philippe HOOGVORST},
title = {Template Attacks with a Power Model},
howpublished = {Cryptology {ePrint} Archive, Paper 2007/443},
year = {2007},
url = {https://eprint.iacr.org/2007/443}
}
