Practical and Efficient FHE-based MPC

ePrint Report: Practical and Efficient FHE-based MPC

Nigel P. Smart

We present a reactive MPC protocol built from FHE which is robust in the presence of active adversaries. In addition the protocol enables reduced bandwidth via means of transciphering, and also enables more expressive/efficient programs via means of a $\mathsf{Declassify}$ operation. All sub-components of the protocol can be efficiently realised using existing technology. We prove our protocol secure in the UC framework.

addition adversaries bandwidth components eprint report fhe mpc nigel protocol report smart