Cryptology ePrint Archive: Report 2016/149
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.
Category / Keywords: secret-key cryptography /
Date: received 17 Feb 2016
Contact author: nlwt8988 at gmail com
Available format(s): PDF | BibTeX Citation
Version: 20160218:220451 (All versions of this report)
Short URL: ia.cr/2016/149
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