Welcome to the resource topic for 2011/160
Title:
Cryptanalysis of ARMADILLO2
Authors: Mohamed Ahmed Abdelraheem, Céline Blondeau, María Naya-Plasencia, Marion Videau, 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.
ePrint: https://eprint.iacr.org/2011/160
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