Cryptology ePrint Archive: Report 2008/227

New Impossible Differential Cryptanalysis of ARIA

Ruilin Li, Bing Sun, Peng Zhang and Chao Li

Abstract: This paper studies the security of ARIA against impossible differential cryptanalysis. Firstly an algorithm is given to find many new 4-round impossible differentials of ARIA. Followed by such impossible differentials, we improve the previous impossible differential attack on 5/6-round ARIA. We also point out that the existence of such impossible differentials are due to the bad properties of the binary matrix employed in the diffusion layer.

Category / Keywords: secret-key cryptography / Block Cipher, Impossible Differential, ARIA

Publication Info: unpublished paper

Date: received 19 May 2008, last revised 29 May 2008

Contact author: securitylrl at gmail com

Available format(s): Postscript (PS) | Compressed Postscript (PS.GZ) | PDF | BibTeX Citation

Note: correction for 5 round attack

Version: 20080529:063545 (All versions of this report)

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