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2018 | OriginalPaper | Buchkapitel

Concretely Efficient Large-Scale MPC with Active Security (or, TinyKeys for TinyOT)

verfasst von : Carmit Hazay, Emmanuela Orsini, Peter Scholl, Eduardo Soria-Vazquez

Erschienen in: Advances in Cryptology – ASIACRYPT 2018

Verlag: Springer International Publishing

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Abstract

In this work we develop a new theory for concretely efficient, large-scale MPC with active security. Current practical techniques are mostly in the strong setting of all-but-one corruptions, which leads to protocols that scale badly with the number of parties. To work around this issue, we consider a large-scale scenario where a small minority out of many parties is honest and design scalable, more efficient MPC protocols for this setting. Our results are achieved by introducing new techniques for information-theoretic MACs with short keys and extending the work of Hazay et al. (CRYPTO 2018), which developed new passively secure MPC protocols in the same context. We further demonstrate the usefulness of this theory in practice by analyzing the concrete communication overhead of our protocols, which improve upon the most efficient previous works.

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Titel: Concretely Efficient Large-Scale MPC with Active Security (or, TinyKeys for TinyOT)
verfasst von: Carmit Hazay
Emmanuela Orsini
Peter Scholl
Eduardo Soria-Vazquez
Verlag: Springer International Publishing
Buch: Advances in Cryptology – ASIACRYPT 2018
Print ISBN: 978-3-030-03331-6

Electronic ISBN: 978-3-030-03332-3

Copyright-Jahr: 2018
DOI: https://doi.org/10.1007/978-3-030-03332-3_4

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