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Title:
Error-Detecting in Monotone Span Programs with Application to Communication Efficient Multi-Party Computation
Authors: Nigel P. Smart, Tim Wood
Abstract:Recent improvements in the state-of-the-art of MPC for non-full-threshold access structures introduced the idea of using a collision-resistant hash functions and redundancy in the secret-sharing scheme to construct a communication-efficient MPC protocol which is computationally-secure against malicious adversaries, with abort. The prior work is based on replicated secret-sharing; in this work we extend this methodology to {\em any} multiplicative LSSS implementing a Q_2 access structure. To do so we need to establish a folklore property of error detection for such LSSS and their associated Monotone Span Programs. In doing so we obtain communication-efficient online and offline protocols for MPC in the pre-processing model.
ePrint: https://eprint.iacr.org/2018/467
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