Paper 2024/893 Original: eprint.iacr.org/2024/893 ↗
How to Construct Quantum FHE, Generically
Abstract
We construct a (compact) quantum fully homomorphic encryption (QFHE) scheme starting from any (compact) classical fully homomorphic encryption scheme with decryption in $\mathsf{NC}^{1}$, together with a dual-mode trapdoor function family. Compared to previous constructions (Mahadev, FOCS 2018; Brakerski, CRYPTO 2018) which made non-black-box use of similar underlying primitives, our construction provides a pathway to instantiations from different assumptions. Our construction uses the techniques of Dulek, Schaffner and Speelman (CRYPTO 2016) and shows how to make the client in their QFHE scheme classical using dual-mode trapdoor functions. As an additional contribution, we show a new instantiation of dual-mode trapdoor functions from group actions.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2024-06-04: last updated
- 2024-06-04: published
- Short URL
- https://ia.cr/2024/893
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2024/893,
author = {Aparna Gupte and Vinod Vaikuntanathan},
title = {How to Construct Quantum FHE, Generically},
howpublished = {Cryptology {ePrint} Archive, Paper 2024/893},
year = {2024},
url = {https://eprint.iacr.org/2024/893}
}