An architecture for practical actively secure MPC with dishonest majority

  • Authors:
  • Marcel Keller;Peter Scholl;Nigel P. Smart

  • Affiliations:
  • University of Bristol, Bristol, United Kingdom;University of Bristol, Bristol, United Kingdom;University of Bristol, Bristol, United Kingdom

  • Venue:
  • Proceedings of the 2013 ACM SIGSAC conference on Computer & communications security
  • Year:
  • 2013

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Abstract

We present a runtime environment for executing secure programs via a multi-party computation protocol in the preprocessing model. The runtime environment is general and allows arbitrary reactive computations to be performed. A particularly novel aspect is that it automatically determines the minimum number of rounds needed for a computation, given a specific instruction sequence, and it then uses this to minimize the overall cost of the computation. Various experiments are reported on, on various non-trivial functionalities. We show how, by utilizing the ability of modern processors to execute multiple threads at a time, one can obtain various tradeoffs between latency and throughput