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Fast Collision Attacks on SKEIN3 and Other Hash Functions

by Q. El-Baz, Y. Sharma

ABSTRACT

The analysis method used for the SKEIN3 hash is differential attack, widely used for analyzing block ciphers. In general, the differential attack especially in block ciphers is a kind of XOR differential attack which uses exclusive-or as the difference, first proposed by Y. Sharma. The differential attack introduced in this paper, is a kind of precise differential which uses the difference in term of integer modular subtraction. This allows us to find collisions efficiently, using between ten to forty minutes of computation time.

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