Welcome to the resource topic for 2017/944
Title:
A Unified Approach to Constructing Black-box UC Protocols in Trusted Setup Models
Authors: Susumu Kiyoshima, Huijia Lin, Muthuramakrishnan Venkitasubramaniam
Abstract:We present a unified framework for obtaining black-box constructions of Universal Composable (UC) protocol in trusted setup models. Our result is analogous to the unified framework of Lin, Pass, and Venkitasubramaniam [STOC’09, Asiacrypt’12] that, however, only yields non-black-box constructions of UC protocols. Our unified framework shows that to obtain black-box constructions of UC protocols, it suffices to implement a special purpose commitment scheme that is, in particular, concurrently extractable using a given trusted setup. Using our framework, we improve black-box constructions in the common reference string and tamper-proof hardware token models by weakening the underlying computational and setup assumptions.
ePrint: https://eprint.iacr.org/2017/944
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