Related-key cryptanalysis on 7-round AES-128/192
by Jie Cui; Hong Zhong; Runhua Shi; Jiankai Wang
International Journal of Electronic Security and Digital Forensics (IJESDF), Vol. 7, No. 2, 2015

Abstract: AES is the most widely used block cipher today, and its security is one of the most important issues in cryptanalysis. In this paper the authors present two attacks on 7-round AES-128/192 to improve the known cryptanalysis by changing the order of round transformations, using the alternative representation of the round keys, exploiting the relationship of keys, designing the key difference pattern properly. We reduce complexity to 2160 and 2104 respectively using the improved attack methods. Our attacks are faster than the best previous attacks.

Online publication date: Thu, 28-May-2015

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