Welcome to the resource topic for 2023/1254
Title:
A Low-Round Distributed PRF from Lattices and its Application to Distributed Key Management
Authors: Matthias Geihs, Hart Montgomery
Abstract:We initiate the study of lattice-based pseudo-random functions (PRFs) for use in multi-party computation protocols, motivated by their application to distributed key management. We show that the LWE-based PRF of Boneh et al. (CRYPTO’13) can be turned into a distributed PRF protocol that runs in only 8 online rounds, improving over the state-of-the-art by an order of magnitude. The resulting protocol can be used as a method for distributed key derivation and reduces the amount of managed key material in distributed key management systems from linear in the number of users to constant. Finally, we support our findings by implementing and evaluating our protocol using the MP-SPDZ framework (CCS’20).
ePrint: https://eprint.iacr.org/2023/1254
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