Paper 2009/238

Attacks on Round-Reduced BLAKE

LI Ji and XU Liangyu

Abstract

BLAKE is a new hash family proposed for SHA-3. The core of compression function reuses the core function of ChaCha. A round-dependent permutation is used as message schedule. BLAKE is claimed to achieve full diffusion after 2 rounds. However, message words can be controlled on the first several founds. By exploiting properties of message permutation, we can attack 2.5 reduced rounds. The results do not threat the security claimed in the specification.

Metadata
Available format(s)
PDF
Publication info
Published elsewhere. Unknown where it was published
Keywords
hash functions
Contact author(s)
ji li @ sony com cn
History
2009-05-30: received
Short URL
https://ia.cr/2009/238
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2009/238,
      author = {LI Ji and XU Liangyu},
      title = {Attacks on Round-Reduced BLAKE},
      howpublished = {Cryptology ePrint Archive, Paper 2009/238},
      year = {2009},
      note = {\url{https://eprint.iacr.org/2009/238}},
      url = {https://eprint.iacr.org/2009/238}
}
Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content.