Don't Eject the Impostor: Fast Three-Party Computation With a Known Cheater (Full Version)

ePrint Report: Don't Eject the Impostor: Fast Three-Party Computation With a Known Cheater (Full Version)

Andreas Brüggemann, Oliver Schick, Thomas Schneider, Ajith Suresh, Hossein Yalame

Secure multi-party computation (MPC) enables (joint) computations on sensitive data while maintaining privacy. In real-world scenarios, asymmetric trust assumptions are often most realistic, where one somewhat trustworthy entity interacts with smaller clients. We generalize previous two-party computation (2PC) protocols like MUSE (USENIX Security'21) and SIMC (USENIX Security'22) to the three-party setting (3PC) with one malicious …

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