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Published in:
2010 | OriginalPaper | Chapter
Improved Impossible Differential Cryptanalysis of 7-Round AES-128
Authors : Hamid Mala, Mohammad Dakhilalian, Vincent Rijmen, Mahmoud Modarres-Hashemi
Published in: Progress in Cryptology - INDOCRYPT 2010
Publisher: Springer Berlin Heidelberg
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Using a new 4-round impossible differential in AES that allows us to exploit the redundancy in the key schedule of AES-128 in a way more effective than previous work, we present a new impossible differential attack on 7 rounds of this block cipher. By this attack, 7-round AES-128 is breakable with a data complexity of about 2
106
chosen plaintexts and a time complexity equivalent to about 2
110
encryptions. This result is better than any previously known attack on AES-128 in the single-key scenario.