By Tim Güneysu, Helena Handschuh

This e-book constitutes the refereed lawsuits of the seventeenth foreign Workshop on Cryptographic and Embedded structures, CHES 2015, held in Saint Malo, France, in September 2015. The 34 complete papers integrated during this quantity have been conscientiously reviewed and chosen from 128 submissions. they're equipped within the following topical sections: processing concepts in side-channel research; cryptographic implementations; homomorphic encryption in undefined; side-channel assaults on public key cryptography; cipher layout and cryptanalysis; precise random quantity turbines and entropy estimations; side-channel research and fault injection assaults; higher-order side-channel assaults; bodily unclonable capabilities and trojans; side-channel assaults in perform; and lattice-based implementations.

**Read or Download Cryptographic Hardware and Embedded Systems -- CHES 2015: 17th International Workshop, Saint-Malo, France, September 13-16, 2015, Proceedings PDF**

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**Additional resources for Cryptographic Hardware and Embedded Systems -- CHES 2015: 17th International Workshop, Saint-Malo, France, September 13-16, 2015, Proceedings**

**Sample text**

Practical Template Attacks. , Yung, M. ) WISA 2004. LNCS, vol. 3325, pp. 440–456. Springer, Heidelberg (2005) 18. : A formal study of power variability issues and side-channel attacks for nanoscale devices. G. ) EUROCRYPT 2011. LNCS, vol. 6632, pp. 109– 128. Springer, Heidelberg (2011) 19. : A stochastic model for diﬀerential side channel cryptanalysis. , Sunar, B. ) CHES 2005. LNCS, vol. 3659, pp. 30–46. Springer, Heidelberg (2005) 20. : Partition vs. comparison sidechannel distinguishers: an empirical evaluation of statistical tests for univariate side-channel attacks against two unprotected CMOS devices.

One 1 1≤q≤Q Yq =y Yq =y advantage of this method is that it explicitly takes into account the sensitive variables Y . It can be easily checked, that, asymptotically, each column ZyD tends to T αD y when Q −→ +∞. Therefore, Z D,#Y (Z D,#Y ) tends to a D × D matrix T proportional to αD (αD ) . Here, the noise has been averaged away in each class y, which is a second advantage. Therefore, in the sequel, we shall refer to the inter-class PCA of [1] simply as PCA. We have the following spectral characterization of the asymptotic PCA: Proposition 11.

As a result, it does make sense to minimize the impact of dimensionality reduction on the success rate for this optimal attack so as not to be biased by performance loss or gain due to other factors. The optimal attack, also known as the template attack [6], consists in applying the maximum likelihood principle [20]. Having collected Q traces of dimensionality D in a matrix xD,Q , where each trace xD q corresponds to a known plaintext tq , the best key guess that maximizes the probability of success is given by D(xD,Q , tQ ) = arg max p(xD,Q |tQ , k ∗ = k) k = arg max pN D,Q (xD,Q − αD y Q (k)) k (4) (5) Q = arg max k where pN q,D (z D ) = D pN q,D (xD q − α yq (k)) (6) 1 T exp − (z D ) Σ −1 z D .