Cryptographic Hardware and Embedded Systems - CHES 2013: by Amir Moradi, Oliver Mischke (auth.), Guido Bertoni,

By Amir Moradi, Oliver Mischke (auth.), Guido Bertoni, Jean-Sébastien Coron (eds.)

This e-book constitutes the lawsuits of the fifteenth overseas Workshop on Cryptographic and Embedded platforms, CHES 2013, held in Santa Barbara, CA, united states, in August 2013. The 27 papers provided have been rigorously reviewed and chosen from 132 submissions. The papers are geared up within the following topical sections: side-channel assaults; actual unclonable functionality; light-weight cryptography; implementations and fault assaults; effective and safe implementations; elliptic curve cryptography; overlaying; side-channel assaults and countermeasures.

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By Amir Moradi, Oliver Mischke (auth.), Guido Bertoni, Jean-Sébastien Coron (eds.)

This e-book constitutes the lawsuits of the fifteenth overseas Workshop on Cryptographic and Embedded platforms, CHES 2013, held in Santa Barbara, CA, united states, in August 2013. The 27 papers provided have been rigorously reviewed and chosen from 132 submissions. The papers are geared up within the following topical sections: side-channel assaults; actual unclonable functionality; light-weight cryptography; implementations and fault assaults; effective and safe implementations; elliptic curve cryptography; overlaying; side-channel assaults and countermeasures.

Show description

Read Online or Download Cryptographic Hardware and Embedded Systems - CHES 2013: 15th International Workshop, Santa Barbara, CA, USA, August 20-23, 2013. Proceedings PDF

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Additional info for Cryptographic Hardware and Embedded Systems - CHES 2013: 15th International Workshop, Santa Barbara, CA, USA, August 20-23, 2013. Proceedings

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In the first setting, we assume that the targeted subkey is known and we compare the state of the art formulae expressing the success rate as a function of the leakage noise and the algebraic properties of the cryptographic primitive. We also make the link between these formulae and the recent work of Fei et al. at CHES 2012. In the second setting, the subkey is no longer assumed to be known and we introduce the notion of confidence level in an attack result, allowing for the study of different heuristics.

For example, and as illustrated in previous section, applying the selection rule R0 for a CPA on 800 noisy observations (with noise standard deviation equal to 10) leads to an attack failure in 18% of the cases. As a consequence, to reach a 90% confidence level, the attacker has either to perform the attack on more observations (1000 in our example), or to use an other selection rule. Indeed, different selection rules lead to different confidence levels, as they are based on different information. Though a rule based on the whole matrix Ms would theoretically give the best results, the estimation of the confidence level in such a case would prove to be difficult.

However, having only the DC blocker without the amplifier the effect is less visible and requires slightly more traces. In fact, it is related to the high-pass filter available at the input of the DC blocker and the amplifier. The successful attack on our original target design (shown in Fig. 6) can be repeated using either the DC blocker or solely the amplifier. Vdd R AC 1 MΩ Mode Vcc CRYPTO CORE DC 50 Ω Mode Amp DC blocker Fig. 7. Measurement setups: (left) standard and (right) amplified On the Simplicity of Converting Leakages from Multivariate to Univariate 19 (a) standard setup (b) standard setup (c) amplified setup Fig.

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