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Authors: Josef Kokeš ; Jonatan Matějka and Róbert Lórencz

Affiliation: Department of Information Security, Faculty of Information Technology, Czech Technical University in Prague, Thákurova 9, Praha 6, Czech Republic

Keyword(s): AES, Rijndael, Cipher, Encryption, S-Box, Key Recovery, Plaintext Recovery, Dynamic Analysis.

Abstract: In this paper we propose an algorithm that can automatically detect the use of AES and automatically recover both the encryption key and the plaintext. It makes use of the fact that we can monitor accesses to the AES S-Box and deduce the desired data from these accesses; the approach is suitable to software-based AES implementations, both naíve and optimized. To demonstrate the feasibility of this approach we designed a tool which implements the algorithm for Microsoft Windows running on the Intel x86 architecture. The tool has been successfully tested against a set of applications using different cryptographic libraries and common user applications.

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Paper citation in several formats:
Kokeš, J.; Matějka, J. and Lórencz, R. (2021). Automatic Detection and Decryption of AES by Monitoring S-Box Access. In Proceedings of the 7th International Conference on Information Systems Security and Privacy - ICISSP; ISBN 978-989-758-491-6; ISSN 2184-4356, SciTePress, pages 172-180. DOI: 10.5220/0010255201720180

@conference{icissp21,
author={Josef Kokeš. and Jonatan Matějka. and Róbert Lórencz.},
title={Automatic Detection and Decryption of AES by Monitoring S-Box Access},
booktitle={Proceedings of the 7th International Conference on Information Systems Security and Privacy - ICISSP},
year={2021},
pages={172-180},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0010255201720180},
isbn={978-989-758-491-6},
issn={2184-4356},
}

TY - CONF

JO - Proceedings of the 7th International Conference on Information Systems Security and Privacy - ICISSP
TI - Automatic Detection and Decryption of AES by Monitoring S-Box Access
SN - 978-989-758-491-6
IS - 2184-4356
AU - Kokeš, J.
AU - Matějka, J.
AU - Lórencz, R.
PY - 2021
SP - 172
EP - 180
DO - 10.5220/0010255201720180
PB - SciTePress

- Science and Technology Publications, Lda.
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