Fluid MPC: Secure Multiparty Computation with Dynamic Participants
Fluid MPC: Secure Multiparty Computation with Dynamic Participants
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Fluid MPC:具有动态参与者的安全多方计算
DOI:
10.1007/978-3-030-84245-1_4
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Choudhuri, A.R.
中科院分区:
文献类型:
--
作者:
Choudhuri, A.R.
Existing approaches to secure multiparty computation (MPC) require all participants to commit to the entire duration of the protocol. As interest in MPC continues to grow, it is inevitable that there will be a desire to use it to evaluate increasingly complex functionalities, resulting in computations spanning several hours or days.Such scenarios call for adynamicparticipation model for MPC where participants have the flexibility to go offline as needed and (re)join when they have available computational resources. Such a model would also democratize access to privacy-preserving computation by facilitating an “MPC-as-a-service” paradigm—the deployment of MPC in volunteer-operated networks (such as blockchains, where dynamism is inherent) that perform computation on behalf of clients.In this work, we initiate the study offluid MPC, where parties can dynamically join and leave the computation. The minimum commitment required from each participant is referred to asfluidity, measured in the number of rounds of communication that it must stay online. Our contributions are threefold:We provide a formal treatment of fluid MPC, exploring various possible modeling choices.We construct information-theoretic fluid MPC protocols in the honest-majority setting. Our protocols achievemaximal fluidity, meaning that a party can exit the computation after receiving and sending messages in one round.We implement our protocol and test it in multiple network settings.
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DOI:
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发表时间:
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期刊:
Annual International Cryptology Conference
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DOI:
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IACR Cryptol. ePrint Arch.
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发表时间:
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期刊:
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影响因子:
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DOI:
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发表时间:
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期刊:
IEEE Cybersecurity Development
影响因子:
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