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Malicious Security Comes Free in Honest-Majority MPC Vipul Goyal and Yifan Song( ) Carnegie Mellon University, Pittsburgh, USA vipul@cmu.edu, yifans2@andrew.cmu.edu Abstract. We study the communication complexity of unconditionally secure MPC over point-to-point channels for corruption threshold t < n/2. We ask the question: “is it possible to achieve security-with- abort with the same concrete cost as the best-known semi-honest MPC…

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