Read e-book online Advances in Cryptology - EUROCRYPT 2007: 26th Annual PDF

By Marc Stevens, Arjen Lenstra, Benne de Weger (auth.), Moni Naor (eds.)

ISBN-10: 3540725393

ISBN-13: 9783540725398

Those are the court cases of Eurocrypt 2007, the twenty sixth Annual IACR EurocryptConference. The convention was once subsidized via the foreign organization forCryptologic examine (IACR; see www.iacr.org), this 12 months in cooperation withthe study crew on arithmetic utilized to Cryptography at UPC and theResearch workforce on info safeguard at UMA. The Eurocrypt 2007 ProgramCommittee (PC) consisted of 24 individuals whose names are indexed at the nextpage.The computer selected a number of rules: 0 notebook papers - no software Committeemember may perhaps publish papers; non-compulsory anonymity - authors may perhaps pick out toanonymize their papers or no longer. nameless papers have been handled as ordinary, i.e.,the author’s identification used to be no longer printed to the computer. The submission software program usedwas “Web Submission and evaluation software program” written and maintained via ShaiHalevi. there have been 173 papers submitted to the convention and the computer chose33 of them. each one paper used to be assigned to at the least 3 workstation participants, who eitherhandled it themselves or assigned it to an exterior referee. After the studies weresubmitted, the committee deliberated either on-line for a number of weeks and finallyin a face-to-face assembly held in Paris. as well as notification of the decisionof the committee, authors bought experiences. Our objective was once to supply meaningfulcomments to authors of all papers (both these chosen for this system andthose no longer selected). The default for any record given to the committee was once thatit could be on hand to the authors in addition.

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Additional info for Advances in Cryptology - EUROCRYPT 2007: 26th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Barcelona, Spain, May 20-24, 2007. Proceedings

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The classical double block length hash-function is MDC-2, illustrated in Figure 1. 31 and ISO/IEC 10118-2 standards [1, 13], and it is implemented in popular libraries and toolkits, such as OpenSSL. This paper gives the first proof of security for MDC-2. Our result establishes that when MDC-2 is based on an ideal blockcipher with keylength and blocklength of n bits, the adversary must ask well over 2n/2 queries to find a collision. 9 forward-or-backward queries of a 128-bit blackbox-modeled blockcipher.

We answer this question in the affirmative: any combiner for functions with range {0, 1}v must have output length at least (v − O(log(q))) bits3 , where q is the number of oracle calls made by the combiner. Stated in asymptotic terms, if q ∈ 2o(v) is subexponential, then the output length is in (1 − o(1))v , and if q is constant the output length is in v − O(1), this must be compared to v which is trivially achieved by concatenation. (k, )-Robust Combiner. In this paper we will consider the more general question whether secure and non-trivial (k, )-robust combiners for collision-resistant hash-functions exist.

D. pdf. 9. org/2006/105. 10. K. Lenstra, X. M. org/2005/067. An updated version has been published as an appendix to [11]. 11. K. M. de Weger, On the possibility of constructing meaningful hash collisions for public keys, ACISP 2005, Springer LNCS 3574 (2005), 267–279. 12. O. org/2004/356. 13. Paul C. van Oorschot and Michael J. Wiener, Parallel collision search with cryptanalytic applications, Journal of Cryptology 12(1), 1–28, 1999. 14. org/2006/360. 15. org/2006/104. 16. Marc Stevens, TU Eindhoven MSc thesis, in preparation.

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Advances in Cryptology - EUROCRYPT 2007: 26th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Barcelona, Spain, May 20-24, 2007. Proceedings by Marc Stevens, Arjen Lenstra, Benne de Weger (auth.), Moni Naor (eds.)


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