Black-Box Constructions of Bounded-Concurrent Secure Computation

Black-Box Constructions of Bounded-Concurrent Secure Computation
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有界并发安全计算的黑盒结构

DOI:
10.1007/978-3-030-57990-6_5
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发表时间:
2020
期刊:
Security and Cryptography for Networks
影响因子:
--
通讯作者:
Garg S., Liang X.
Garg S., Liang X.
中科院分区:
--
文献类型:
--
作者:
Garg S., Liang X.

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我们构建了一个通用的安全多方计算协议,它仍然是安全的(先验)有界并发组合下,只使用黑箱密码原语。在此之前,我们的工作,这样的协议的建设需要非黑箱使用的密码原语,或者,黑盒的建设只能实现超多项式模拟为基础的安全概念,提供无与伦比的安全guarantee.Our协议有一个恒定的轮数,并依赖于标准的多项式硬度假设,即存在半诚实的不经意的传输和抗碰撞的哈希函数。以前,这样的协议甚至在亚指数假设下也是未知的。
We construct a general purpose secure multiparty computation protocol which remains secure under (a-priori) bounded-concurrent composition and makes only black-box use of cryptographic primitives. Prior to our work, constructions of such protocols required non-black-box usage of cryptographic primitives; alternatively, black-box constructions could only be achieved for super-polynomial simulation based notions of security which offer incomparable security guarantees.Our protocol has a constant number of rounds and relies on standard polynomial-hardness assumptions, namely, the existence of semi-honest oblivious transfers and collision-resistant hash functions. Previously, such protocols were not known even under sub-exponential assumptions.
静态输入安全计算的不可能性结果
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