Paper 2022/447 Original: eprint.iacr.org/2022/447 ↗
Leveled Multikey FHE with constant-size ciphertexts from RLWE
Abstract
A multi-key fully homomorphic encryption (MKFHE) scheme allows a public server to evaluate arbitrary circuits over ciphertexts encrypted under different keys. One of the main drawbacks of MKFHE schemes is the need for a ciphertext expansion procedure prior to evaluation, which combines ciphertexts encrypted under different keys to a (much larger) ciphertext encrypted under a concatenated key. In this paper, we present a new (leveled) RLWE-based MKFHE scheme without ciphertext expansion.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2022-04-12: last updated
- 2022-04-12: published
- Short URL
- https://ia.cr/2022/447
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2022/447,
author = {Vanesa Daza and Paz Morillo and Sergi Rovira},
title = {Leveled Multikey FHE with constant-size ciphertexts from RLWE},
howpublished = {Cryptology {ePrint} Archive, Paper 2022/447},
year = {2022},
url = {https://eprint.iacr.org/2022/447}
}