Welcome to the resource topic for 2009/477
Title:
Preimages for Step-Reduced SHA-2
Authors: Jian Guo, Krystian Matusiewicz
Abstract:In this paper, we present a preimage attack for 42 step-reduced SHA-256 with time complexity 2^{251.7} and memory requirements of order 2^{12}. The same attack also applies to 42 step-reduced SHA-512 with time complexity 2^{502.3} and memory requirements of order 2^{22}. Our attack is meet-in-the-middle preimage attack.
ePrint: https://eprint.iacr.org/2009/477
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