By Mihir Bellare, Dennis Hofheinz, Scott Yilek (auth.), Antoine Joux (eds.)

This publication constitutes the refereed lawsuits of the twenty eighth Annual overseas convention at the idea and functions of Cryptographic thoughts, EUROCRYPT 2009, held in Cologne, Germany, in April 2009.

The 33 revised complete papers provided including 1 invited lecture have been conscientiously reviewed and chosen from 148 submissions. The papers tackle all present foundational, theoretical and examine elements of cryptology, cryptography, and cryptanalysis in addition to complex functions. The papers are prepared in topical sections on safety, proofs, and versions, hash cryptanalysis, workforce and broadcast encryption, cryptosystems, cryptanalysis, part channels, curves, and randomness.

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Additional info for Advances in Cryptology - EUROCRYPT 2009: 28th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Cologne, Germany, April 26-30, 2009. Proceedings

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Possibility and Impossibility Results for Encryption and Commitment 23 On the role of property P. , property) P. The obvious question is: what if the assumption already is an idealized commitment scheme secure under selective openings? ” We give a detailed explanation of what is going on in Section 9. Stateless breaking oracles. In our impossibility results, we will describe a computational world with a number of oracles. For instance, there will be a “breaking oracle” B, such that B aids in breaking the SEM-SO-COM security of any given commitment scheme, and in nothing more.

172–184. : Encryption schemes secure under selective opening attack. : Completeness theorems for noncryptographic fault-tolerant distributed computation. In: 20th ACM Symposium on Theory of Computing, Proceedings of STOC 1988, pp. 1–10. : Coin flipping by telephone. In: Gersho, A. ) Advances in Cryptology, A report on CRYPTO 1981, number 82-04 in ECE Report, pp. 11–15. : On notions of security for deterministic encryption, and efficient constructions without random oracles. In: Wagner, D. ) CRYPTO 2008.

Definition 5 (Interactive proof/argument system). An interactive proof system for a language L with witness relation R is a pair of PPT machines IP = (P, V) such that the following holds: Completeness. For every family (xλ , wλ )λ∈Æ such that R(xλ , wλ ) for all λ and |xλ | is polynomial in λ, we have that the probability for V(xλ ) to output 1 after interacting with P(xλ , wλ ) is at least 2/3. Soundness. For every machine P ∗ and every family (xλ , zλ )λ∈Æ such that |xλ | = λ and xλ ∈ L for all λ, we have that the probability for V(xλ ) to output 1 after interacting with P ∗ (xλ , zλ ) is at most 1/3.

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