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Cryptanalysis of hash functions with structures. (English) Zbl 1267.94074
Jacobson, Michael J. jun. (ed.) et al., Selected areas in cryptography. 16th annual international workshop, SAC 2009, Calgary, Alberta, Canada, August 13–14, 2009. Revised selected papers. Berlin: Springer (ISBN 978-3-642-05443-3/pbk). Lecture Notes in Computer Science 5867, 108-125 (2009).
Summary: Hash function cryptanalysis has acquired many methods, tools and tricks from other areas, mostly block ciphers. In this paper another trick from block cipher cryptanalysis, the structures, is used for speeding up the collision search. We investigate the memory and the time complexities of this approach under different assumptions on the round functions. The power of the new attack is illustrated with the cryptanalysis of the hash functions Grindahl and the analysis of the SHA-3 candidate Fugue (both functions as 256 and 512 bit versions). The collision attack on Grindahl-512 is the first collision attack on this function.
For the entire collection see [Zbl 1177.94012].

MSC:
94A60 Cryptography
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