Abstract
In this paper we present a novel attack based on photonic emission analysis targeting software implementations of AES. We focus on the particular case in which the attacker can collect the photonic emission of a limited number of sense amplifiers (e.g. only one) of the SRAM storing the S-Box. The attack consists in doing hypothesis on the secret key based on the knowledge of the partial output of the SubBytes operation. We also consider the possibility to attack a masked implementation of AES using the photonic emission analysis. In the case of masking, the attacker needs 2 leakages of the same encryption to overcome the randomization of the masks. For our analysis, we assume the same physical setup described in other previous works. Reported results are based on simulations with some hypothesis on the probability of photonic emission of a single transistor.
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Bertoni, G.M., Grassi, L., Melzani, F. (2015). Simulations of Optical Emissions for Attacking AES and Masked AES. In: Chakraborty, R., Schwabe, P., Solworth, J. (eds) Security, Privacy, and Applied Cryptography Engineering. SPACE 2015. Lecture Notes in Computer Science(), vol 9354. Springer, Cham. https://doi.org/10.1007/978-3-319-24126-5_11
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DOI: https://doi.org/10.1007/978-3-319-24126-5_11
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