A Comment on Gu Map-1

Yupu Hu; Huiwen Jia

Paper 2015/448

A Comment on Gu Map-1

Yupu Hu and Huiwen Jia

Abstract

Gu map-1 is a modified version of GGH map. It uses same ideal lattices for constructing the trapdoors, while the novelty is that no encodings of zero are given. In this short paper we show that Gu map-1 cannot be used for the instance of witness encryption (WE) based on the hardness of 3-exact cover problem. That is, if Gu map-1 is used for such instance, we can break it by solving a combined 3-exact cover problem. The reason is just that no encodings of zero are given.

Metadata

Available format(s): PDF
Publication info: Preprint. MINOR revision.
Keywords: Multilinear maps GGH map Gu map-1 Multi-party key exchange (MPKE)Witness encryption (WE)Lattice based cryptography
Contact author(s): yphu @ mail xidian edu cn
History: 2015-05-11: received
Short URL: https://ia.cr/2015/448
License: CC BY

BibTeX

@misc{cryptoeprint:2015/448,
      author = {Yupu Hu and Huiwen Jia},
      title = {A Comment on Gu Map-1},
      howpublished = {Cryptology {ePrint} Archive, Paper 2015/448},
      year = {2015},
      url = {https://eprint.iacr.org/2015/448}
}