Cryptographic Hardware and Embedded Systems -- CHES 2015: by Tim Güneysu, Helena Handschuh

By Tim Güneysu, Helena Handschuh

This booklet 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 ideas 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.

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

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9 1 Fig. 2. Comparison of the SNR of asymptotic LDA (optimal) and of asymptotic PCA 5 Practical Validation In this section, we investigate real traces. Experiments are carried out on the DPA contest v2 [34] traces. One clock cycle lasts D = 200 samples. As traces are captured from a hardware implementation of an AES, we consider the Hamming distance leakage model (in accordance with most attacks reported on the analyzed device [8], namely a SASEBO-GII board with a Xilinx XC5VLX30 FPGA [28]). In the sequel, we focus on the Hamming distance between the byte 0 of the last round and that of the cipher text.

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. H. ) ICISC 2008. LNCS, vol. 5461, pp. 253–267. Springer, Heidelberg (2009) 21. : A unified framework for the analysis of side-channel key recovery attacks. In: Joux, A. ) EUROCRYPT 2009. LNCS, vol. 5479, pp. 443–461. Springer, Heidelberg (2009) 22. : Improving differential power analysis by elastic alignment.

24) into Eq. (25), one obtains ˆ= Σ 1 Q−1 X D,Q − Q T Q D,Q (Y ) Y X T Y Q (Y Q ) T Q,Q − = D,Q 1 Q−1 X I = D,Q 1 Q−1 X I Q,Q − = 1 Q−1 (Y Q ) Y Q Y Q (Y Q )T X X D,Q (X Y Q (Y D,Q T ) − Q )T Q T Q D,Q (Y ) Y X T Y Q (Y Q ) T 2 T (X D,Q ) T (Y Q ) Y Q − D,Q (26) T (X D,Q ) T (27) T X D,Q (Y Q ) Y Q (X D,Q ) T Y Q (Y Q ) . 38 N. Bruneau et al. In Eq. 26, I Q,Q denotes the Q × Q identity matrix, and we use in Eq. , equal to its square. Remark 3. We have the following remarkable identity: X D,Q (X D,Q ) T T = α ˆ D (ˆ αD ) Y Q (Y Q ) T ˆ + (Q − 1)Σ.

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