Cryptology ePrint Archive: Report 2022/487

New Key Recovery Attack on Reduced-Round AES

Navid Ghaedi Bardeh and Vincent Rijmen

Abstract: A new fundamental 4-round property against AES, called the zero-difference property, was introduced by Rønjom, Bardeh and Helleseth at Asiacrypt 2017. Our work characterizes it in a simple way by exploiting the notion of related differences which was introduced and well analyzed by AES designers. We then are interested in the way of extending the 4-round property by considering some further properties of related differences over the AES linear layer, generalizing the zero-difference property. This results in a new key recovery attack on 7-round AES which is the first attack on 7-round AES by exploiting the zero-difference property.

Category / Keywords: secret-key cryptography / SPN and AES and Secret-Key model and Zero-difference cryptanalysis and Related differences and Related differentials

Date: received 21 Apr 2022

Contact author: navid ghaedibardeh at gmail com

Available format(s): PDF | BibTeX Citation

Version: 20220423:190417 (All versions of this report)

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