New Key-Recovery Attack on Reduced-Round AES

Authors

  • Navid Ghaedi Bardeh Norwegian University of Science and Technology, Trondheim, Norway; iagon, Oslo, Norway
  • Vincent Rijmen imec - Computer Security and Industrial Cryptography (COSIC) Research Group, KU Leuven, Leuven, Belgium; University of Bergen, Bergen, Norway

DOI:

https://doi.org/10.46586/tosc.v2022.i2.43-62

Keywords:

SPN, AES, Secret-Key model, Zero-difference cryptanalysis, Related differences, Related differentials

Abstract

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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Published

2022-06-10

How to Cite

Ghaedi Bardeh, N., & Rijmen, V. (2022). New Key-Recovery Attack on Reduced-Round AES. IACR Transactions on Symmetric Cryptology, 2022(2), 43–62. https://doi.org/10.46586/tosc.v2022.i2.43-62

Issue

Volume 2022, Issue 2

Section

Articles

License

Copyright (c) 2022 Navid Ghaedi Bardeh, Vincent Rijmen

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.