Download Cryptographic Hardware and Embedded Systems - CHES 2009: by Emilia Käsper, Peter Schwabe (auth.), Christophe Clavier, PDF
By Emilia Käsper, Peter Schwabe (auth.), Christophe Clavier, Kris Gaj (eds.)
This publication constitutes the refereed lawsuits of the eleventh foreign Workshop on Cryptographic and Embedded structures, CHES 2009, held in Lausanne, Switzerland in the course of September 6-9, 2009.
The booklet includes three invited talks and 29 revised complete papers which have been rigorously reviewed and chosen from 148 submissions. The papers are geared up in topical sections on software program implementations, aspect channel research of mystery key cryptosystems, part channel research of public key cryptosystems, aspect channel and fault research countermeasures, pairing-based cryptography, new ciphers and effective implementations, TRNGs and gadget identity, trojans and depended on ICs, theoretical elements, and fault analysis.
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Extra resources for Cryptographic Hardware and Embedded Systems - CHES 2009: 11th International Workshop Lausanne, Switzerland, September 6-9, 2009 Proceedings
5 encryption each, so we have added the time required for two encryptions. We expect that a complete implementation would be slightly more eﬃcient due to function call overhead. We tested encryption and decryption on messages of size 32, 512 and 4096 bytes, with 128-, 192- and 256-bit keys. Our classical encryption code was optimized for OCB mode; we expect that its ECB and CTR timings could be improved by 1-2% with further tuning. Due to cache eﬀects, encryption of long messages is slightly slower than encryption of short messages in some cases.
Y7 ) the 4-long vector of 32-bit signed words (x0 y0 + x1 y1 , x2 y2 + x3 y3 , x4 y4 + x5 y5 , x6 y6 + x7 y7 ), avoids many carries when evaluating a matrix-vector product (mod q). -T. Chen et al. Finally, we reiterate that, like most implementation works such as the one by Bogdanov et al , we only discuss implementation issues and do not concern ourselves with the security of MPKCs in this paper. Those readers interested in the security and design of MPKCs are instead referred to the MPKC book  and numerous research papers in the literature.
We expect that microarchitectural optimization can improve the speed of our code signiﬁcantly. This will be a major focus of future work. We also expect that this work can be applied to other primitives; it would be interesting to see if Camellia, Fugue or LEX can be implemented as eﬃciently. References 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. : Cache-timing attacks on AES. : Eﬃcient Galois ﬁeld arithmetic on SIMD architectures. In: Proceedings of the 15th ACM Symposium on Parallelism in Algorithms and Architectures, pp.