A Unified Approach to Constructing Black-Box UC Protocols in Trusted Setup Models
A Unified Approach to Constructing Black-Box UC Protocols in Trusted Setup Models
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DOI：
10.1007/978-3-319-70500-2_26
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发表时间：
2017-11
期刊：
影响因子：
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通讯作者：
Susumu Kiyoshima;Huijia Lin;Muthuramakrishnan Venkitasubramaniam
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文献类型：
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作者：
Susumu Kiyoshima;Huijia Lin;Muthuramakrishnan Venkitasubramaniam
我们提出了一个统一的框架，用于在可信设置模型中获得通用可组合(UC)协议的黑盒构造。我们的结果类似于Lin，Pass和Venkitasubramaniam[STEC‘09，ASIACRYPT’12]的统一框架，然而，它只产生UC协议的非黑盒构造。我们的统一框架表明，要获得UC协议的黑盒构造，只需实现一个特殊用途的承诺方案就足够了，该方案特别是使用给定的可信设置可并发提取的。使用我们的框架，我们通过弱化基本的计算和设置假设，改进了公共参考串和防篡改硬件令牌模型中的黑盒结构。
We present a unified framework for obtainingblack-boxconstructions ofUniversal 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 yieldsnon-black-boxconstructions 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.