Download e-book for iPad: Advances in Cryptology - CRYPTO 2007: 27th Annual by Vivien Dubois, Pierre-Alain Fouque, Adi Shamir, Jacques

By Vivien Dubois, Pierre-Alain Fouque, Adi Shamir, Jacques Stern (auth.), Alfred Menezes (eds.)

ISBN-10: 3540741429

ISBN-13: 9783540741428

The twenty seventh Annual overseas Cryptology convention used to be held in Santa Barbara, California, in August 2007. The convention drew researchers from worldwide who got here to provide their findings and talk about the newest advancements within the box. This e-book constitutes the refereed lawsuits of the conference.

Thirty-three complete papers are provided besides one vital invited lecture. each has been rigorously reviewed through the editor to make sure that all papers are actual, effortless to learn, and make a tremendous contribution to the field.

The papers handle present foundational, theoretical, and examine facets of cryptology, cryptography, and cryptanalysis. furthermore, readers will detect many complicated and rising applications.

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Read Online or Download Advances in Cryptology - CRYPTO 2007: 27th Annual International Cryptology Conference, Santa Barbara, CA, USA, August 19-23, 2007. Proceedings PDF

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Extra resources for Advances in Cryptology - CRYPTO 2007: 27th Annual International Cryptology Conference, Santa Barbara, CA, USA, August 19-23, 2007. Proceedings

Example text

Thus, we have a related-key composite IV-recovery attack against MD5 with 2 × 24 × 245 ≈ 251 oracle queries and 2100 MD5 evaluations. If we try to guess bits in Q1 , we have to select at least 244 hashes with 64 chosen bits; this costs about 2108 MD5, so it does not improve the attack. 3 MD5 Attack Summary Thus, the Contini-Yin NMAC-MD5 attack can be extended into a full keyrecovery attack in the related-key setting, with a query complexity of 251 , a Full Key-Recovery Attacks on HMAC/NMAC-MD4 and NMAC-MD5 27 time complexity of 2100 MD5 operations, and success rate of 2−4 (due to the dBB condition for k1 and k2 ).

Output: A solution sol ∈ Pn (x). 1. Compute y = Arep (x). 2. Compute r = Fsn (y). 3. Output sol = Arand (y, r). Theorem 1. Let P be a search problem. Suppose P has (i) an efficient output sampling algorithm Arand ; and (ii) an efficient canonical representative algorithm Arep . Then Algorithm General Equivalence Protecting is an efficient equivalence protecting algorithm for P. We focus on search problems in which an output is a subset of the input satisfying some property. We reduce the design of a canonical representative algorithm into deciding whether an input element is contained in some possible output.

Acknowledgement Part of this work is supported by the Commission of the European Communities through the IST program under contract IST-2002-507932 ECRYPT, and by the French government through the Saphir RNRT project. References 1. : Time-memory-processor trade-offs. IEEE Transactions on Information Theory 34(3), 505–512 (1988) 2. : New Proofs for NMAC and HMAC: Security Without Collision Resistance. In: Dwork, C. ) CRYPTO 2006. LNCS, vol. 4117, pp. 602–619. Springer, Heidelberg (2006) 3. : Keying Hash Functions for Message Authentication.

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Advances in Cryptology - CRYPTO 2007: 27th Annual International Cryptology Conference, Santa Barbara, CA, USA, August 19-23, 2007. Proceedings by Vivien Dubois, Pierre-Alain Fouque, Adi Shamir, Jacques Stern (auth.), Alfred Menezes (eds.)

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