[Resource Topic] 2022/353: SNARGs for P from Sub-exponential DDH and QR

Welcome to the resource topic for 2022/353

Title:
SNARGs for P from Sub-exponential DDH and QR

Authors: James Hulett, Ruta Jawale, Dakshita Khurana, Akshayaram Srinivasan

Abstract:

We obtain publicly verifiable Succinct Non-Interactive Arguments (SNARGs) for arbitrary deterministic computations and bounded space non-deterministic computation from standard group-based assumptions, without relying on pairings. In particular, assuming the sub-exponential hardness of both the Decisional Diffie-Hellman (DDH) and Quadratic Residuosity (QR) assumptions, we obtain the following results, where n denotes the length of the instance: 1. A SNARG for any language that can be decided in non-deterministic time T and space S with communication complexity and verifier runtime (n + S) \cdot T^{o(1)}. 2. A SNARG for any language that can be decided in deterministic time T with communication complexity and verifier runtime n \cdot T^{o(1)}.

ePrint: https://eprint.iacr.org/2022/353

Talk: https://www.youtube.com/watch?v=MTPFIwL4IuA

Slides: https://iacr.org/submit/files/slides/2022/eurocrypt/eurocrypt2022/228/slides.pptx

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