Paper 2019/046

Block-Anti-Circulant Unbalanced Oil and Vinegar

Alan Szepieniec and Bart Preneel

Abstract

We introduce a new technique for compressing the public keys of the UOV signature scheme that makes use of block-anti-circulant matrices. These matrices admit a compact representation as for every block, the remaining elements can be inferred from the first row. This space saving translates to the public key, which as a result of this technique can be shrunk by a small integer factor. We propose parameters sets that take into account several important attacks.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. SAC 2019
Keywords
multivariate quadraticpost-quantumunbalanced oil and vinegar
Contact author(s)
alan @ nervos org
History
2019-06-20: last of 2 revisions
2019-01-25: received
See all versions
Short URL
https://ia.cr/2019/046
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2019/046,
      author = {Alan Szepieniec and Bart Preneel},
      title = {Block-Anti-Circulant Unbalanced Oil and Vinegar},
      howpublished = {Cryptology {ePrint} Archive, Paper 2019/046},
      year = {2019},
      url = {https://eprint.iacr.org/2019/046}
}
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