[Resource Topic] 2014/685: Bit Security of the CDH Problems over Finite Field

Welcome to the resource topic for 2014/685

Title:
Bit Security of the CDH Problems over Finite Field

Authors: Mingqiang Wang, Tao Zhan, Haibin Zhang

Abstract:

It is a long-standing open problem to prove the existence of (deterministic) hard-core predicates for the Computational Diffie-Hellman (CDH) problem over finite fields, without resorting to the generic approaches for any one-way functions (e.g., the Goldreich-Levin hard-core predicates). Fazio et al. (FGPS, Crypto '13) make important progress on this problem by defining a weaker Computational Diffie-Hellman problem over \mathbb{F}_{p^2}, i.e., Partial-CDH problem, and proving, when allowing changing field representations, the unpredictability of every single bit of one of the coordinates of the secret Diffie-Hellman value.

ePrint: https://eprint.iacr.org/2014/685

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