By Josh Jaffe (auth.), Pascal Paillier, Ingrid Verbauwhede (eds.)
CHES2007,theninthworkshoponCryptographicHardwareandEmbeddedS- tems, used to be subsidized through the foreign organization for Cryptologic learn (IACR) and held in Vienna, Austria, September 10–13, 2007. The workshop - ceived ninety nine submissions from 24 international locations, of which this system Committee (39 individuals from 15 nations) chosen 31 for presentation. For the ?rst time within the heritage of CHES, every one submission was once reviewed via at the very least 4 reviewers rather than 3 (and no less than ?ve for submissions via laptop individuals, these now being constrained to 2 according to member) and lots of submitted papers have bought lots of additional experiences (some papers acquired as much as 9 reviews), hence totalling the unparalleled list of 483 studies total. Thepaperscollectedinthisvolumerepresentcutting-edgeworldwideresearch within the quickly evolving ?elds of crypto-hardware, fault-based and side-channel cryptanalysis, and embedded cryptography, on the crossing of educational and - dustrial study. The vast variety of matters showing in those court cases covers almost all similar components and indicates our e?orts to increase the scope of CHES greater than ordinary. even though a comparatively younger workshop, CHES is now ?rmlyestablishedasascienti?ceventofreferenceappreciatedbymoreandmore popular specialists of concept and perform: many top of the range works have been subm- ted, all of which, unfortunately, couldn't be approved. opting for from such a lot of strong worksis no effortless activity and our private thank you visit the individuals of this system Committee for his or her involvement, excellence, and harmony. we're thankful to the varied exterior reviewers indexed less than for his or her services and suggestions in our deliberations.
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Extra info for Cryptographic Hardware and Embedded Systems - CHES 2007: 9th International Workshop, Vienna, Austria, September 10-13, 2007. Proceedings
3156, pp. 1–15. 1. In , a variant of Algorithm 1. is given in which Step 2 is replaced by Sj (x ⊕ Mj ) ← Sj−1 (x) ⊕ Nj . 2 becomes a 4-th order ﬂaw. Indeed, the values stored in memory during the ﬁrst and the second loop iteration of the d-th table recomputation are not more Sd (0) and Sd (1) but Sd (Md ) and Sd (Md ⊕ 1). The two last variables satisfy Sd (Md ) = S(M ⊕ Md ) ⊕ N and Sd (Md ⊕ 1) = S(M ⊕ Md ⊕ 1) ⊕ N . 2). Therefore, in addition to these two variables, an attacker needs to target not only M0 = Y ⊕M but also Md in order to unmask Y .
CHES 2000. LNCS, vol. 1965, pp. 238– 251. Springer, Heidelberg (2000) 16. : Template Attacks on Masking – Resistance is Futile. In: Abe, M. ) CT-RSA 2007. LNCS, vol. 4377, pp. 243–256. Springer, Heidelberg (2006) 17. : Practical Second-Order DPA Attacks for Masked Smart Card Implementations of Block Ciphers. In: Pointcheval, D. ) CT-RSA 2006. LNCS, vol. 3860, pp. 192–207. Springer, Heidelberg (2006) 18. : Feature Representation and Discrimination Based on Gaussian Mixture Model Probability Densities – Practices and Algorithms.
S for the diﬀerent methodical approaches. All samples were normalized before applying statistics. s of Table 2. , the absolute diﬀerence of the two scalar components of z i is computed as suggested by Messerges . Results are presented in Table 3. One can observe that the key recovery eﬃciency of EM estimates is very close to templates. Further, there are only small decreases in the success rate for the variants based on a reduced set of free parameters. Another result of Table 3 is that using second-order DPA one needs about twice the number of samples for a comparable success rate.
Cryptographic Hardware and Embedded Systems - CHES 2007: 9th International Workshop, Vienna, Austria, September 10-13, 2007. Proceedings by Josh Jaffe (auth.), Pascal Paillier, Ingrid Verbauwhede (eds.)