International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 13 May 2015

Yupu Hu, Huiwen Jia
ePrint Report ePrint Report
As a modified version of GGH map, Gu map-1 was successful in constructing multi-party key exchange (MPKE). In this short paper we present a result about the parameter setting of Gu map-1, therefore we can reduce a key parameter $\\tau$ from original $O(n^{2})$ down to $O(\\lambda n)$ (in theoretically secure case, where $\\lambda$ is the security parameter), and even down to $O(2n)$ (in computationally secure case). Such optimization greatly reduces the size of the map.

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