On the security ofPiccolo lightweight block cipher against related-key impossible differentials

Marine Minier 1, *
* Auteur correspondant
1 PRIVATICS - Privacy Models, Architectures and Tools for the Information Society
Inria Grenoble - Rhône-Alpes, CITI - CITI Centre of Innovation in Telecommunications and Integration of services
Abstract : textit{Piccolo} is a new lightweight block cipher proposed at CHES 2011~\cite{piccolo}. It ciphers plaintext blocks of length 64 bits under keys of lengths 80 or 128 bits. It is based on a modified Feistel structure with a variable number of rounds. In this paper, we present two related key impossible differential attacks against 14 rounds of Piccolo-80 and 21 rounds of Piccolo-128 without the whitening layers. The attack against Piccolo-80 has a time and data complexity of 2^68.19 whereas the time/data complexity of the attack against Piccolo-128 is 2^117.77. Keywords: Lightweight block ciphers, Piccolo, related-key impossible differential attack.
Type de document :
Communication dans un congrès
Progress in Cryptology - INDOCRYPT 2013, Dec 2013, Mumbay, India. Springer, 8250, pp.308-318, 2013, 〈10.1007/978-3-319-03515-4_21〉
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https://hal.inria.fr/hal-00918965
Contributeur : Marine Minier <>
Soumis le : lundi 16 décembre 2013 - 10:43:06
Dernière modification le : samedi 27 octobre 2018 - 01:19:54

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Marine Minier. On the security ofPiccolo lightweight block cipher against related-key impossible differentials. Progress in Cryptology - INDOCRYPT 2013, Dec 2013, Mumbay, India. Springer, 8250, pp.308-318, 2013, 〈10.1007/978-3-319-03515-4_21〉. 〈hal-00918965〉

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