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Black-Box Constructions of Two-Party Protocols from One-Way Functions

机译:单向函数的两方协议的黑匣子构造

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We exhibit constructions of the following two-party cryptographic protocols given only black-box access to a one-way function:rn1. constant-round zero-knowledge arguments (of knowledge) for any language in NP;rn2. constant-round trapdoor commitment schemes;rn3. constant-round parallel coin-tossing.rnPrevious constructions either require stronger computational assumptions (e.g. collision-resistant hash functions), non-black-box access to a one-way function, or a super-constant number of rounds. As an immediate corollary, we obtain a constant-round black-box construction of secure two-party computation protocols starting from only semi-honest oblivious transfer. In addition, by combining our techniques with recent constructions of concurrent zero-knowledge and non-malleable primitives, we obtain black-box constructions of concurrent zero-knowledge arguments for NP and non-malleable commitments starting from only one-way functions.
机译:我们展示了以下两方加密协议的构造,仅允许黑盒访问单向功能:rn1。 NP中任何语言的(知识的)恒定舍入零知识变元; rn2。恒定轮活板门承诺方案; rn3。以前的构造可能需要更强的计算假设(例如,抗碰撞的哈希函数),对单向函数的非黑匣子访问或超恒定数量的回合。作为直接的必然结果,我们获得了一个安全的两方计算协议的恒定轮黑盒构造,该协议仅从半诚实的遗忘传输开始。此外,通过将我们的技术与并发零知识和不可恶意原语的最新构造相结合,我们仅从单向函数就获得了NP和不可恶意承诺的并发零知识参数的黑盒构造。

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