Practical and Efficient FHE-based MPC

Nigel P. Smart

Paper 2023/981 Original: eprint.iacr.org/2023/981 ↗

Practical and Efficient FHE-based MPC

Nigel P. Smart

Abstract

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.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Preprint.
History: 2024-08-21: last updated; 2023-06-23: published
Short URL: https://ia.cr/2023/981
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2023/981,
      author = {Nigel P. Smart},
      title = {Practical and Efficient FHE-based MPC},
      howpublished = {Cryptology {ePrint} Archive, Paper 2023/981},
      year = {2023},
      url = {https://eprint.iacr.org/2023/981}
}