Multikey FHE in the Plain Model

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Paper 2020/180

Multikey FHE in the Plain Model

Prabhanjan Ananth and Abhishek Jain and ZhengZhong Jin and Giulio Malavolta

Abstract

We construct a multikey fully-homomorphic encryption scheme (multikey FHE) with one-round threshold decryption in the plain model, i.e. without a trusted setup, assuming the intractability of standard problems over lattices. Prior to our work, such a scheme was only known to exist assuming sub-exponentially hard indistinguishability obfuscation.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint. MINOR revision.
Keywords: Fully Homomorphic Encryption Multiparty Computation
Contact author(s): giulio malavolta @ hotmail it
History: 2020-11-15: revised; 2020-02-14: received; See all versions
Short URL: https://ia.cr/2020/180
License: CC BY