University of Illinois Urbana-Champaign

Two-round maliciously secure computation with super-polynomial simulation

Agarwal, Amit

Content Files
AGARWAL-THESIS-2021.pdf

Permalink

https://hdl.handle.net/2142/114024

Description

Title
Two-round maliciously secure computation with super-polynomial simulation
Author(s)
Agarwal, Amit
Issue Date
2021-12-09
Director of Research (if dissertation) or Advisor (if thesis)
  • Khurana, Dakshita
  • Miller, Andrew
Department of Study
Computer Science
Discipline
Computer Science
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Date of Ingest
2022-04-29T21:47:47Z
Keyword(s)
  • Cryptography
  • Secure Multiparty Computation
  • Super-Polynomial Simulation
Abstract
We propose the first maliciously secure multi-party computation (MPC) protocol for general functionalities in two rounds, without any trusted setup. Since polynomial-time simulation is impossible in two rounds, we achieve the relaxed notion of superpolynomial-time simulation security [Pass, EUROCRYPT 2003]. Prior to our work, no such maliciously secure protocols were known even in the two-party setting for functionalities where both parties receive outputs. Our protocol is based on the sub-exponential security of standard assumptions plus a special type of non-interactive non-malleable commitment. At the heart of our approach is a two-round multi-party conditional disclosure of secrets (MCDS) protocol in the plain model from bilinear maps, which is constructed from techniques introduced in [Benhamouda and Lin, TCC 2020]. This thesis is based on a joint work with James Bartusek, Vipul Goyal, Dakshita Khurana, and Giulio Malavolta
Graduation Semester
2021-12
Type of Resource
Thesis
Permalink
http://hdl.handle.net/2142/114024
Copyright and License Information
© International Association for Cryptologic Research 2021, doi:10.1007/978-3-030-90459-3_22

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