Paper 2011/160
Cryptanalysis of ARMADILLO2
Mohamed Ahmed Abdelraheem, Céline Blondeau, María Naya-Plasencia, Marion Videau, and Erik Zenner
Abstract
ARMADILLO2 is the recommended variant of a multi-purpose cryptographic primitive dedicated to hardware which has been proposed by Badel et al. in [1]. In this paper we propose a meet-in-the-middle technique that allows us to invert the ARMADILLO2 function. Using this technique we are able to perform a key recovery attack on ARMADILLO2 in FIL-MAC application mode. A variant of this attack can also be applied when ARMADILLO2 is used as a stream cipher in the PRNG application mode. Finally we propose a (second) preimage attack on its hashing application mode. All the cryptanalysis presented in this paper can be applied for any arbitrary bitwise permutations $\sigma_0$ and $\sigma_1$ used in the internal permutation.
Metadata
- Available format(s)
-
PDF
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- ARMADILLO2meet-in-the-middlekey recovery attackpreimage attackparallel matching
- Contact author(s)
- maria naya plasencia @ gmail com
- History
- 2011-09-12: last of 4 revisions
- 2011-03-31: received
- See all versions
- Short URL
- https://ia.cr/2011/160
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2011/160,
author = {Mohamed Ahmed Abdelraheem and Céline Blondeau and María Naya-Plasencia and Marion Videau and Erik Zenner},
title = {Cryptanalysis of {ARMADILLO2}},
howpublished = {Cryptology {ePrint} Archive, Paper 2011/160},
year = {2011},
url = {https://eprint.iacr.org/2011/160}
}
