Abstract
Despite Kerckhoff’s principle, there are secret ciphers with unknown components for diplomatic or military usages. The side-channel analysis of reverse engineering (SCARE) is developed for analyzing secret ciphers. Considering the side-channel leakage, SCARE attacks enable the recovery of some secret parts of a cryptosystem, e.g., the substitution box table. However, based on idealized leakage assumption, most of these attacks have a few limitations on prior knowledge or implementations. In this paper, we focus on AES-like block ciphers with a secret S-box and demonstrate an attack which recovers both the secret key and the secret S-box. On the one hand, the key is recovered under profiled circumstance by leakage analysis and collision attack. On the other hand, the SCARE attack is based on mathematical analysis. It relies on Hamming weight of MixColumns intermediate results in the first round, which can restore the secret S-box. Experiments are performed on real power traces from a software implementation of AES-like block cipher. Moreover, we evaluate the soundness and efficiency of our method by simulations and compare with previous approaches. Our method has more advantages in intermediate results location and the required number of traces. For simulated traces with gaussian noise, our method requires 100000 traces to fully restore the secret S-box, while the previous method requires nearly 300000 traces to restore S-box.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 61872040, U1836101, 61871037, 62002021), National Cryptography Development Fund (MMJJ20170201), and Bei**g Natural Science Foundation (4202070).
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**n Liu was born in 1995. He is studying for a master’s degree in Bei**g Institute of Technology, China. His research interests include side-channel attack and cryptographic implementation.
An Wang was born in 1983. He received his PhD degree in Shangdong University, China in 2011. From 2011 to 2015, he worked as a postdoctoral researcher in Tsinghua University. He currently works as an associate professor in Bei**g Institute of Technology, China. His main research interests include side-channel analysis, embedded system, and cryptographic implementation.
Liehuang Zhu is a professor in the Department of Computer Science at Bei**g Institute of Technology, China. He is selected into the Program for New Century Excellent Talents in University from Ministry of Education, China. His research interests include internet of things, cloud computing security, internet and mobile security.
Yaoling Ding was born in 1987. She received her PhD degree from Tsinghua University, China in 2019. She currently holds a postdoctoral position at Bei**g Institute of Technology, China. Her research interests include side-channel attack and cryptanalysis of block cipher.
Zeyuan Lyu was born in 1997. She is studying for a master’s degree in Bei**g Institute of Technology, China. Her research interests include side-channel attack and cryptographic engineering.
Zongyue Wang was born in 1988. He received his PhD degree in Shandong University, China in 2015. He currently works in Open Security Research, China. His main research interests include side-channel analysis, cryptographic implementation and mobile security.
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Liu, X., Wang, A., Zhu, L. et al. SCARE and power attack on AES-like block ciphers with secret S-box. Front. Comput. Sci. 16, 164814 (2022). https://doi.org/10.1007/s11704-020-0319-z
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DOI: https://doi.org/10.1007/s11704-020-0319-z