Welcome to the resource topic for 2022/447
Title:
Leveled Multikey FHE with constant-size ciphertexts from RLWE
Authors: Vanesa Daza, Paz Morillo, Sergi Rovira
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.
ePrint: https://eprint.iacr.org/2022/447
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