Welcome to the resource topic for 2019/357
Title:
Lattice-based proof of a shuffle
Authors: Núria Costa, Ramiro Martínez, Paz Morillo
Abstract:In this paper we present the first fully post-quantum proof of a shuffle for RLWE encryption schemes. Shuffles are commonly used to construct mixing networks (mix-nets), a key element to ensure anonymity in many applications such as electronic voting systems. They should preserve anonymity even against an attack using quantum computers in order to guarantee long-term privacy. The proof presented in this paper is built over RLWE commitments which are perfectly binding and computationally hiding under the RLWE assumption, thus achieving security in a post-quantum scenario. Furthermore we provide a new definition for a secure mixing node (mix-node) and prove that our construction satisfies this definition.
ePrint: https://eprint.iacr.org/2019/357
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