[Resource Topic] 2021/1450: Efficient Zero-Knowledge Argument in Discrete Logarithm Setting: Sublogarithmic Proof or Sublinear Verifier

Welcome to the resource topic for 2021/1450

Title:
Efficient Zero-Knowledge Argument in Discrete Logarithm Setting: Sublogarithmic Proof or Sublinear Verifier

Authors: Sungwook Kim, Hyeonbum Lee, and Jae Hong Seo

Abstract:

We propose three interactive zero-knowledge arguments for arithmetic circuit of size N in the common random string model, which can be converted to be non-interactive by Fiat-Shamir heuristics in the random oracle model. First argument features O(\sqrt{\log N}) communication and round complexities and O(N) computational complexity for the verifier. Second argument features O(\log N) communication and O(\sqrt{N}) computational complexity for the verifier. Third argument features O(\log N) communication and O(\sqrt{N}\log N) computational complexity for the verifier. Contrary to first and second arguments, the third argument is free of reliance on pairing-friendly elliptic curves. The soundness of three arguments is proven under the standard discrete logarithm and/or the double pairing assumption, which is at least as reliable as the decisional Diffie-Hellman assumption.

ePrint: https://eprint.iacr.org/2021/1450

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