Powers-of-Tau to the People: Decentralizing Setup Ceremonies

Valeria Nikolaenko, Sam Ragsdale, Joseph Bonneau, Dan Boneh

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We propose several decentralized ceremonies for constructing a powers-of-tau structured reference string (SRS). Our protocols make use of a blockchain platform to run in a permissionless manner, where anyone can contribute randomness in exchange for paying the requisite transaction fees. The resulting SRS is secure as long as any single party participates honestly. We introduce several protocols optimized for different sized powers-of-tau setups and using an on-chain or off-chain data availability model to store the resulting string. We implement our most efficient protocol on top of Ethereum, demonstrating practical concrete performance.

Original languageEnglish (US)
Title of host publicationApplied Cryptography and Network Security - 22nd International Conference, ACNS 2024, Proceedings
EditorsChristina Pöpper, Lejla Batina
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages30
ISBN (Print)9783031547751
StatePublished - 2024
Event22nd International Conference on Applied Cryptography and Network Security, ACNS 2024 - Abu Dhabi, United Arab Emirates
Duration: Mar 5 2024Mar 8 2024

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume14585 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference22nd International Conference on Applied Cryptography and Network Security, ACNS 2024
Country/TerritoryUnited Arab Emirates
CityAbu Dhabi

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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