By Mitsuri Matsui
This ebook constitutes the refereed court cases of the fifteenth foreign convention at the idea and alertness of Cryptology and knowledge safety, ASIACRYPT 2009, held in Tokyo, Japan, in December 2009.
The forty-one revised complete papers offered have been rigorously reviewed and chosen from 298 submissions. The papers are geared up in topical sections on block ciphers, quantum and post-quantum, hash features I, encryption schemes, multi social gathering computation, cryptographic protocols, hash funtions II, versions and frameworks I, cryptoanalysis: sq. and quadratic, types and framework II, hash features III, lattice-based, and aspect channels.
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EUROCRYPT 1990. LNCS, vol. 473, pp. 389–404. Springer, Heidelberg (1991) 23. : Linear Cryptoanalysis Method for DES Cipher. In: Helleseth, T. ) EUROCRYPT 1993. LNCS, vol. 765, pp. 386–397. Springer, Heidelberg (1994) 24. : On the Security of the IDEA Block Cipher. In: Helleseth, T. ) EUROCRYPT 1993. LNCS, vol. 765, pp. 371–385. Springer, Heidelberg (1994) 25. : Cryptanalysis of IDEA-X/2. In: Johansson, T. ) FSE 2003. LNCS, vol. 2887, pp. 1–8. ch Comenius University, Bratislava, Slovakia Department of Computer Science Abstract.
If p3 and q 3 are ﬁxed, u3 and t3 are also ﬁxed with respect to any Z53 and Z63 . It indicates that X14 = Y13 ⊕ u3 = X14 . Note that Y14 and Y1 4 are the results of modular-multiplying X14 and X14 with the same Z14 , hence Y14 is equal to Y1 4 . On the other hand, ∆Y23 = 8000x means that the least signiﬁcant 15 bits of 3 Y2 are equal to those of Y2 3 and the most signiﬁcant bit of Y23 and that of Y2 3 are diﬀerent. Because u3 is ﬁxed, by Lemma 1, the least signiﬁcant 15 bits of X34 are equal to those of X34 .
In this attack, it is possible that the expected time of individual attacks are larger than exhaustively search directly for some key-dependent subsets, which means 2n + β · 28 ≥ 28 Under this condition, the attack also uses exhaustive key search to determine the remaining eight key bits to make sure the time needed not exceed exhaustive search. 34 X. Sun and X. 01 to ensure that the attack successes with 99% probability. 5 encryptions. Our experiment shows that the attack needs at most 75 pairs of encryptions for one test.
Advances in Cryptology - ASIACRYPT 2009: 15th International Conference on the Theory and Application of Cryptology and Information Security, Tokyo, Japan, ... Computer Science / Security and Cryptology) by Mitsuri Matsui