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Title:
An Optimization of Gu Map-1
Authors: Yupu Hu, Huiwen Jia
Abstract: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.
ePrint: https://eprint.iacr.org/2015/453
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