TY - GEN
T1 - Two-Round Maliciously Secure Computation with Super-Polynomial Simulation
AU - Agarwal, Amit
AU - Bartusek, James
AU - Goyal, Vipul
AU - Khurana, Dakshita
AU - Malavolta, Giulio
N1 - Publisher Copyright:
© 2021, International Association for Cryptologic Research.
PY - 2021
Y1 - 2021
N2 - 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].
AB - 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].
UR - http://www.scopus.com/inward/record.url?scp=85120073044&partnerID=8YFLogxK
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U2 - 10.1007/978-3-030-90459-3_22
DO - 10.1007/978-3-030-90459-3_22
M3 - Conference contribution
AN - SCOPUS:85120073044
SN - 9783030904586
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 654
EP - 685
BT - Theory of Cryptography - 19th International Conference, TCC 2021, Proceedings
A2 - Nissim, Kobbi
A2 - Waters, Brent
A2 - Waters, Brent
PB - Springer
T2 - 19th International Conference on Theory of Cryptography, TCC 2021
Y2 - 8 November 2021 through 11 November 2021
ER -