Threshold Garbled Circuits and Ad Hoc Secure Computation
Threshold Garbled Circuits and Ad Hoc Secure Computation
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阈值乱码电路和Ad Hoc安全计算
DOI:
10.1007/978-3-030-77883-5_3
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Ostrovsky, Rafail
中科院分区:
文献类型:
--
作者:
Ciampi, Michele;Goyal, Vipul;Ostrovsky, Rafail
Garbled Circuits (GCs) represent fundamental and powerful tools in cryptography, and many variants of GCs have been considered since their introduction. An important property of the garbled circuits is that they can be evaluated securely if and only if exactly 1 key for each input wire is obtained: no less and no more. In this work we study the case when: 1) some of the wire-keys are missing, but we are still interested in computing the output of the garbled circuit and 2) the evaluator of the GC might have both keys for a constant number of wires. We start to study this question in terms of non-interactive multi-party computation (NIMPC) which is strongly connected with GCs. In this notion there is a fixed number of parties (n) that can get correlated information from a trusted setup. Then these parties can send an encoding of their input to an evaluator, which can compute the output of the function. Similarly to the notion ofad hoc secure computationproposed by Beimel et al. [ITCS 2016], we consider the case when less thannparties participate in the online phase, and in addition we let these parties colluding with the evaluator. We refer to this notion asThreshold NIMPC.In addition, we show that when the number of parties participating in the online phase is a fixed thresholdthen it is possible to securely evaluate any-input function. We build our result on top of a new secret-sharing scheme (which can be of independent interest) and on the results proposed by Benhamouda, Krawczyk and Rabin [Crypto 2017]. Our protocol can be used to compute any function inin the information-theoretic setting and any function inPassuming one-way functions.As a second (and main) contribution, we consider a slightly different notion of security in which the number of parties that can participate in the online phase is not specified, and can be any numbercabove the threshold(in this case the evaluator cannot collude with the other parties). We solve an open question left open by Beimel, Ishai and Kushilevitz [Eurocrypt 2017] showing how to build a secure protocol for the case whencis constant, under the Learning with Errors assumption.
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DOI:
--
发表时间:
2017
期刊:
IACR Cryptology ePrint Archive
影响因子:
--
作者:
Fabrice Benhamouda;H. Krawczyk;T. Rabin
通讯作者:
T. Rabin
DOI:
10.1007/978-3-319-56617-7_20
发表时间:
2017-04
期刊:
IACR Cryptol. ePrint Arch.
影响因子:
--
作者:
A. Beimel;Yuval Ishai;E. Kushilevitz
通讯作者:
A. Beimel;Yuval Ishai;E. Kushilevitz
DOI:
--
发表时间:
2016
期刊:
Annual International Cryptology Conference
影响因子:
--
作者:
B. Hemenway;Zahra Jafargholi;R. Ostrovsky;Alessandra Scafuro;Daniel Wichs
通讯作者:
Daniel Wichs
DOI:
--
发表时间:
2005
期刊:
International Conference on the Theory and Application of Cryptology and Information Security
影响因子:
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作者:
V. Kolesnikov
通讯作者:
V. Kolesnikov
DOI:
--
发表时间:
2016
期刊:
Theory of Cryptography Conference
影响因子:
--
作者:
Zahra Jafargholi;Daniel Wichs
通讯作者:
Daniel Wichs