Welcome to the resource topic for 2009/112
Title:
A 2nd-Preimage Attack on AURORA-512
Authors: Yu Sasaki
Abstract:In this note, we present a 2nd-preimage attack on AURORA-512, which is one of the candidates for SHA-3. Our attack can generate 2nd-preimages of any given message, in particular, the attack complexity becomes optimal when the message length is 9 blocks or more. In such a case, the attack complexity is approximately 2^{290} AURORA-512 operations, which is less than the brute force attack on AURORA-512, namely, 2^{512-\log_2{9}}\approx2^{508}. Our attack exploits some weakness in the mode of operation.
ePrint: https://eprint.iacr.org/2009/112
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