Abstract
In this article we describe an improved concept for second-order differential-power analysis (DPA) attacks on masked smart card implementations of block ciphers. Our concept allows to mount second-order DPA attacks in a rather simple way: a second-order DPA attack consists of a pre-processing step and a DPA step. Therefore, our way of performing second-order DPA attacks allows to easily assess the number of traces that are needed for a successful attack. We give evidence on the effectiveness of our methodology by showing practical attacks on a masked AES smart card implementation. In these attacks we target inputs and outputs of the SubBytes operation in the first encryption round.
The work described in this paper has been supported in part by the European Commission through the IST Programme under Contract IST-2002-507270 SCARD and through the Austrian Science Fund (FWF) under grant number P16952.
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Oswald, E., Mangard, S., Herbst, C., Tillich, S. (2006). Practical Second-Order DPA Attacks for Masked Smart Card Implementations of Block Ciphers. In: Pointcheval, D. (eds) Topics in Cryptology – CT-RSA 2006. CT-RSA 2006. Lecture Notes in Computer Science, vol 3860. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11605805_13
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DOI: https://doi.org/10.1007/11605805_13
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