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Characterization and use of the EM radiation to enhance side channel attacks

Abstract : Nowadays the mathematical algorithms for cryptography are becoming safer and deemed unbreakable from a mathematical point of view. So the confidence in cryptographic algorithms is increasing and the design of mathematical cryptographic algorithms remains definitively robust. However, the hardware implementation of cryptographic components are still vulnerable to physical attacks. Side Channel Analysis (SCA) is a threat for crypto systems as they can be used to recover secret key. These unintentional physical emanations can be analysed in a view to derive some sensitive information from them. In this thesis we conduct a more precise study of electromagnetic radiation and their characterization in the frequency domain to improve the EMA attacks at distance. We propose a method by combining time samples to improve these attacks, in order to limit the degradation of the leakage model due to low signal to noise ratio. Next we show the limits of the attack before proposing methods of frequency analysis, to focus the analysis on a wide band of frequencies and improve the quality of the signal carrying information. Finally we see that some methods used in electromagnetic compatibility and more precisely to evaluate susceptibility of electronic device. These techniques can be employed to perform fault attack and disrupt cryptographic component.
Keywords : EMA DPA
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Submitted on : Wednesday, August 7, 2013 - 10:37:12 AM
Last modification on : Tuesday, August 16, 2022 - 3:45:30 PM
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  • HAL Id : pastel-00850528, version 1



Olivier Meynard. Characterization and use of the EM radiation to enhance side channel attacks. Other. Télécom ParisTech, 2012. English. ⟨NNT : 2012ENST0002⟩. ⟨pastel-00850528⟩



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