@inproceedings{d229aa228d7c4c138c98e15661611a81,
title = "Nicknames for Group Signatures",
abstract = "Nicknames for Group Signatures (NGS) is a new signature scheme that extends Group Signatures (GS) with Signatures with Flexible Public Keys (SFPK). Via GS, each member of a group can sign messages on behalf of the group without revealing his identity, except to a designated auditor. Via SFPK, anyone can create new identities for a particular user, enabling anonymous transfers with only the intended recipient able to trace these new identities. To prevent the potential abuses that this anonymity brings, NGS integrates flexible public keys into the GS framework to support auditable transfers. In addition to introducing NGS, we describe its security model and provide a mathematical construction proved secure in the Random Oracle Model. As a practical NGS use case, we build NickHat, a blockchain-based token-exchange prototype system on top of Ethereum.",
keywords = "Auditability, Blockchain, Group signature, Nickname, Privacy",
author = "Guillaume Quispe and Pierre Jouvelot and G{\'e}rard Memmi",
note = "Publisher Copyright: {\textcopyright} The Author(s), under exclusive license to Springer Nature Switzerland AG 2026.; 21st International Workshop on Security and Trust Management, STM 2025 ; Conference date: 25-09-2025 Through 26-09-2025",
year = "2026",
month = jan,
day = "1",
doi = "10.1007/978-3-032-06155-3\_12",
language = "English",
isbn = "9783032061546",
series = "Lecture Notes in Computer Science",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "210--230",
editor = "Sokratis Katsikas and Cristina Alcaraz",
booktitle = "Security and Trust Management - 21st International Workshop, STM 2025, Proceedings",
}