[Resource Topic] 2014/295: ZAPs and Non-Interactive Witness Indistinguishability from Indistinguishability Obfuscation

Welcome to the resource topic for 2014/295

Title:
ZAPs and Non-Interactive Witness Indistinguishability from Indistinguishability Obfuscation

Authors: Nir Bitansky, Omer Paneth

Abstract:

We present new constructions of two-message and one-message witness-indistinguishable proofs (ZAPs and NIWIs). This includes: \begin{itemize} \item ZAP (or, equivalently, non-interactive zero-knowledge in the common random string model) from indistinguishability obfuscation and one-way functions. \item NIWIs from indistinguishability obfuscation and one-way permutations. \end{itemize} The previous construction of ZAPs [Dwork and Naor, FOCS 00] was based on trapdoor permutations. The two previous NIWI constructions were based either on ZAPs and a derandomization-type complexity assumption [Barak, Ong, and Vadhan CRYPTO 03], or on a specific number theoretic assumption in bilinear groups [Groth, Sahai, and Ostrovsky, CRYPTO 06].

ePrint: https://eprint.iacr.org/2014/295

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