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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)
- Publication info
- Preprint. MINOR revision.
- Keywords
- Multilinear mapsGGH mapGu map-1Multi-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