### Improved Integral and Zero-correlation Linear Cryptanalysis of Reduced-round CLEFIA Block Cipher

Wentan Yi and Shaozhen Chen

##### Abstract

CLEFIA is a block cipher developed by Sony Corporation in 2007. It is a recommended cipher of CRYPTREC, and has been adopted as ISO/IEC international standard in lightweight cryptography. In this paper, some new 9-round zero-correlation linear distinguishers of CLEFIA are constructed with the input masks and output masks being independent, which allow multiple zero-correlation linear attacks on 14/15-rounds CLEAIA-192/256 with the partial sum technique. Furthermore, the relations between integral distinguishers and zero-correlation linear approximations are improved, and some new integral distinguishers over 9-round are deduced from zero-correlation linear approximations. By using these integral distinguishers and the partial sum technique, the previous integral results on CLEFIA are improved. The two results have either one more rounds or lower time complexity than previous attack results by means of integral and zero-correlation linear cryptanalysis.

Available format(s)
Category
Secret-key cryptography
Publication info
Preprint. MINOR revision.
Contact author(s)
nlwt8988 @ gmail com
History
Short URL
https://ia.cr/2016/149

CC BY

BibTeX

@misc{cryptoeprint:2016/149,
author = {Wentan Yi and Shaozhen Chen},
title = {Improved Integral and Zero-correlation Linear Cryptanalysis of Reduced-round CLEFIA Block Cipher},
howpublished = {Cryptology ePrint Archive, Paper 2016/149},
year = {2016},
note = {\url{https://eprint.iacr.org/2016/149}},
url = {https://eprint.iacr.org/2016/149}
}

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