New Key-Recovery Attack on Reduced-Round AES
Keywords:SPN, AES, Secret-Key model, Zero-difference cryptanalysis, Related differences, Related differentials
A new fundamental 4-round property of 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 the AES designers. We extend 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.
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Copyright (c) 2022 Navid Ghaedi Bardeh, Vincent Rijmen
This work is licensed under a Creative Commons Attribution 4.0 International License.