@inproceedings{bf16a68ea38f4d88abdd64e1605e9415,
title = "Distributed Shuffling in Adversarial Environments",
abstract = "We study mix-nets in the context of cryptocurrencies. Here we have many computationally weak shufflers that speak one after another and want to joinlty shuffle a list of ciphertexts (c1, ..., cn). Each shuffler can only permute k << n ciphertexts at a time. An adversary A can track some of the ciphertexts and adaptively corrupt some of the shufflers. We present a simple protocol for shuffling the list of ciphertexts efficiently. The main technical contribution of this work is to prove that our simple shuffling strategy does indeed provide good anonymity guarantees and at the same time terminates quickly. Our shuffling algorithm provides a strict improvement over the current shuffling strategy in Ethereum's block proposer elections. Our algorithm is secure against a stronger adversary, provides provable security guarantees, and is comparably in efficiency to the current approach.",
keywords = "Distributed Computing, Shuffling",
author = "Larsen, {Kasper Green} and Maciej Obremski and Mark Simkin",
note = "Publisher Copyright: {\textcopyright} Kasper Green Larsen, Maciej Obremski, and Mark Simkin; licensed under Creative Commons License CC-BY 4.0 4th Conference on Information-Theoretic Cryptography (ITC 2023); 4th Conference on Information-Theoretic Cryptography, ITC 2023 ; Conference date: 06-06-2023 Through 08-06-2023",
year = "2023",
month = jul,
doi = "10.4230/LIPIcs.ITC.2023.10",
language = "English",
series = "Leibniz International Proceedings in Informatics, LIPIcs",
publisher = "Dagstuhl Publishing",
editor = "Kai-Min Chung",
booktitle = "4th Conference on Information-Theoretic Cryptography, ITC 2023",
}