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Smashing MASH-1
Matematičeskie voprosy kriptografii, Tome 5 (2014) no. 2, pp. 21-28 Cet article a éte moissonné depuis la source Math-Net.Ru

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MASH-1 is modular arithmetic based hash function. It is presented in Part 4 of ISO/IEC 10118 standard for one and a half decade. Cryptographic strength of MASH-1 hash function is based on factorization problem of an RSA modulus along with redundancy in the input blocks of compression functions. Despite of this, we are able to introduce two large classes of moduli which allow practical time collision finding algorithm for MASH-1. In one case even multicollisions of arbitrary length may be constructed. 
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V. G. Antipkin. Smashing MASH-1. Matematičeskie voprosy kriptografii, Tome 5 (2014) no. 2, pp. 21-28. http://geodesic.mathdoc.fr/item/MVK_2014_5_2_a2/

[1] Information technology – Security techniques – Hash-functions, Part 1: General, ISO/IEC 10118-1, 2000; Part 2: Hash-functions using an $n$-bit block cipher algorithm, ISO/IEC 10118-2, 2000; Part 3: Dedicated hash-functions, ISO/IEC 10118-3, 2003; Part 4: Hash-functions using modular arithmetic, ISO/IEC 10118-4, 1998