International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 24 July 2015

Gu Chunsheng
ePrint Report ePrint Report
Recently, Hu and Jia presented an efficient attack on the GGH map. They show that the MPKE and WE based on GGH with public tools of encoding are not secure. Currently, an open problem is to fix GGH with functionality-preserving. We present a new construction of multilinear map using ideal lattices, which maintains functionality of GGH with public tools of encoding, such as applications of GGH-based MPKE and WE. The security of our construction depends upon new hardness assumption.

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