Advances in Cryptology – CRYPTO 2005: 25th Annual by Xiaoyun Wang, Hongbo Yu, Yiqun Lisa Yin (auth.), Victor

By Xiaoyun Wang, Hongbo Yu, Yiqun Lisa Yin (auth.), Victor Shoup (eds.)

This ebook constitutes the refereed lawsuits of the twenty fifth Annual foreign Cryptology convention, CRYPTO 2005, held in Santa Barbara, California, united states in August 2005.

The 33 revised complete papers offered have been conscientiously reviewed and chosen from 178 submissions. The papers are prepared in topical sections on hash capabilities, concept, cryptanalysis, 0 wisdom, anonymity, privateness, broadcast encryption, human-oriented cryptography, mystery sharing, multi-party computation, random oracles, info theoretic safeguard, and primitives and protocols.

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Extra resources for Advances in Cryptology – CRYPTO 2005: 25th Annual International Cryptology Conference, Santa Barbara, California, USA, August 14-18, 2005. Proceedings

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Index i 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 index 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 vector index index vector index index vector xi−1 i xi−1 i xi−1 e0000000 33 17 80000002 65 49 2 2 34 18 0 66 50 0 2 35 19 2 67 51 0 80000000 36 20 0 68 52 0 1 37 21 3 69 53 0 0 38 22 0 70 54 0 80000001 39 23 2 71 55 0 2 40 24 2 72 56 0 40000002 41 25 1 73 57 0 2 42 26 0 74 58 0 2 43 27 2 75 59 0 80000000 44 28 2 76 60 0 2 45 29 1 77 61 0 0 46 30 0 78 62 0 80000001 47 31 0 79 63 0 0 48 32 2 80 64 0 40000001 49 33 3 81 65 4 2 50 34 0 82 66 0 2 51 35 2 83 67 0 80000002 52 36 2 84 68 8 1 53 37 0 85 69 0 0 54 38 0 86 70 0 80000001 55 39 2 87 71 10 2 56 40 0 88 72 0 2 57 41 0 89 73 8 2 58 42 0 90 74 20 0 59 43 2 91 75 0 0 60 44 0 92 76 0 1 61 45 2 93 77 40 0 62 46 0 94 78 0 80000002 63 47 2 95 79 28 2 64 48 0 96 80 80 Finding Collisions in the Full SHA-1 31 Table 6.

U} of k indices and a guess of the values of {bi | i ∈ S}. Then the probability that all k guesses are correct is at most 2B /2k , where the probability is over the random variables and the coin flips of the hint generation and the reconstruction procedures. Proof (of claim). Fix an arbitrary sequence of random choices for the reconstruction procedure. Each fixed hint yields a choice of S and a guess of the bits of S. For any fixed hint, the probability, over choice of b1 , . . , bu , that all the guessed Pebbling and Proofs of Work 45 values are consistent with the values of the elements of S is 2−k .

Bu ), produces a subset S ⊂ {1, . . u} of k indices and a guess of the values of {bi | i ∈ S}. Then the probability that all k guesses are correct is at most 2B /2k , where the probability is over the random variables and the coin flips of the hint generation and the reconstruction procedures. Proof (of claim). Fix an arbitrary sequence of random choices for the reconstruction procedure. Each fixed hint yields a choice of S and a guess of the bits of S. For any fixed hint, the probability, over choice of b1 , .

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