Threshold-Optimal MPC With Friends and Foes

ePrint Report: Threshold-Optimal MPC With Friends and Foes

Nikolas Melissaris, Divya Ravi, Sophia Yakoubov

Alon et. al (Crypto 2020) initiated the study of MPC with Friends and Foes (FaF) security, which captures the desirable property that even up to $h^{*}$ honest parties should learn nothing additional about other honest parties’ inputs, even if the $t$ corrupt parties send them extra information. Alon et. al describe two flavors of FaF security: weak FaF, where the simulated view of up to $h^{*}$ …

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