Get Cryptographic Hardware and Embedded Systems - CHES 2013: PDF

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

ISBN-10: 3642403484

ISBN-13: 9783642403484

ISBN-10: 3642403492

ISBN-13: 9783642403491

This booklet constitutes the lawsuits of the fifteenth overseas Workshop on Cryptographic and Embedded structures, CHES 2013, held in Santa Barbara, CA, united states, in August 2013. The 27 papers awarded have been conscientiously reviewed and chosen from 132 submissions. The papers are prepared 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; covering; side-channel assaults and countermeasures.

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

Sample text

N kguess = argmax L k|{yn }N n=1 = argmax k∈K k∈K f·,vk,n (yn ) n=1 N = argmax k∈K log f·,vk,n (yn ) n=1 where vk,n is the key hypothesis-dependent prediction for the intermediate value corresponding to trace measurement yn . Alternatively, the model fitted values (for a particular point in time t∗ ) may be used in a (univariate) correlation DPA [3]. The fitted model produced by ‘classical’ templates is simply the conditional means which comprise the first parameter of the fitted Gaussian distributions: ˆv,t∗ , MCT (v) = E[Yt∗ |V = v] = μ whereas the linear regression-based method returns the intermediate valueconditioned fitted values from the linear regression: p βˆj,t∗ gj (v).

3) 2 √ 1 2π 0 N −3 N −3 Success through Confidence 27 The latter approximation has been further extended to any subkey set of size |K| by Standaert et al. in [10]: ∞ SR 0 1 √ 1 N −3 √ exp − 2π (x − √ 1 )2 1+σ2 dx 2 N −3 |K|−1 . (4) In subsequent works, Rivain [9] and Fei et al. [2] have argued that Assumption 3 is usually not satisfied, which induces an error (possibly high) in (3) and (4) approximations. This observation led Rivain to conduct a new theoretical study of the success rate where the latter assumption is relaxed, and Assumption 1 is replaced by the following one: Assumption 1 bis.

These are at opposite ends of a spectrum—‘very simple’ through to ‘very complex’ model specifications—leaving the middle ground largely unexplored. Hence we seek to evaluate a wider range of model specifications, in a broader, more varied, set of realistic leakage scenarios. In an attempt to make unambiguous, like-for-like comparisons, which are not dependent on the estimation procedures used nor on the unknown underlying distributions arising in experimental scenarios, we follow the theoretic approach advocated in [15] in the context of non-profiled DPA.

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Cryptographic Hardware and Embedded Systems - CHES 2013: 15th International Workshop, Santa Barbara, CA, USA, August 20-23, 2013. Proceedings by Amir Moradi, Oliver Mischke (auth.), Guido Bertoni, Jean-Sébastien Coron (eds.)


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