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Security and Communication Networks
Volume 2018 (2018), Article ID 7453572, 11 pages
https://doi.org/10.1155/2018/7453572
Research Article

Multiple Impossible Differentials Cryptanalysis on 7-Round ARIA-192

Information Science and Technology Institute, Zhengzhou 450000, China

Correspondence should be addressed to Zi-Long Jiang; moc.621@rehpicard

Received 16 October 2017; Revised 28 December 2017; Accepted 4 January 2018; Published 14 March 2018

Academic Editor: Zhe Liu

Copyright © 2018 Zi-Long Jiang and Chen-Hui Jin. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper studies the security of 7-round ARIA-192 against multiple impossible differentials cryptanalysis. We propose six special 4-round impossible differentials which have the same input difference and different output difference with the maximum number of nonzero common bytes. Based on these differentials, we construct six attack trails including the maximum number of common subkey bytes. Under such circumstances, we utilize an efficient sieving process to improve the efficiency of eliminating common subkeys; therefore, both data and time complexities are reduced. Furthermore, we also present an efficient algorithm to recover the master key via guess-and-determine technique. Taking advantage of the above advances, we have obtained the best result so far for impossible differential cryptanalysis of ARIA-192, with time, data, and memory complexities being 7-round ARIA encryptions, chosen plaintexts, and bytes, respectively.