Paper 2022/1674 Original: eprint.iacr.org/2022/1674 ↗
Practical Multi-Key Homomorphic Encryption for More Flexible and Efficient Secure Federated Aggregation (preliminary work)
Abstract
In this work, we introduce a lightweight communication-efficient multi-key approach suitable for the Federated Averaging rule. By combining secret-key RLWE-based HE, additive secret sharing and PRFs, we reduce approximately by a half the communication cost per party when compared to the usual public-key instantiations, while keeping practical homomorphic aggregation performances. Additionally, for LWE-based instantiations, our approach reduces the communication cost per party from quadratic to linear in terms of the lattice dimension.
Metadata
- Available format(s)
PDF- Category
- Applications
- Publication info
- Preprint.
- History
- 2022-12-01: last updated
- 2022-12-01: published
- Short URL
- https://ia.cr/2022/1674
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2022/1674,
author = {Alberto Pedrouzo-Ulloa and Aymen Boudguiga and Olive Chakraborty and Renaud Sirdey and Oana Stan and Martin Zuber},
title = {Practical Multi-Key Homomorphic Encryption for More Flexible and Efficient Secure Federated Aggregation (preliminary work)},
howpublished = {Cryptology {ePrint} Archive, Paper 2022/1674},
year = {2022},
url = {https://eprint.iacr.org/2022/1674}
}