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International Association for Cryptologic Research (IACR)
Abstract
In this paper, we present a preimage attack on reduced versions of Keccak hash functions. We use our recently developed toolkit
CryptLogVer for generating CNF (conjunctive normal form) which is
passed to the SAT solver PrecoSAT. We found preimages for some
reduced versions of the function and showed that full Keccak function
is secure against the presented attack
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