Timed Commitments Revisited

Miguel Ambrona; Marc Beunardeau; Raphaël R. Toledo

Paper 2023/977

Timed Commitments Revisited

Miguel Ambrona, Input Output Global

Marc Beunardeau, Nomadic Labs

Raphaël R. Toledo, Ethereum research

Abstract

Timed commitments (Boneh and Naor, CRYPTO 2000) are a variant of standard commitments which incorporates a forced opening mechanism that allows anyone to reveal the committed message, but not before a certain prescribed date. Timed commitments have a wide-range of applications such as contract signing, fair multi-party computation, sealed bid auctions or new blockchain applications such as preventing front-running or unbiased randomness generation. We revisit the notion of timed commitments and propose an alternative simplified definition. We also provide two new constructions of timed commitments with different trade-offs.

Metadata

Available format(s): PDF
Category: Applications
Publication info: Preprint.
Keywords: timelock blockchain
Contact author(s): marc beunardeau @ nomadic-labs com
History: 2023-06-23: approved; 2023-06-22: received; See all versions
Short URL: https://ia.cr/2023/977
License: CC BY

BibTeX

@misc{cryptoeprint:2023/977,
      author = {Miguel Ambrona and Marc Beunardeau and Raphaël R. Toledo},
      title = {Timed Commitments Revisited},
      howpublished = {Cryptology ePrint Archive, Paper 2023/977},
      year = {2023},
      note = {\url{https://eprint.iacr.org/2023/977}},
      url = {https://eprint.iacr.org/2023/977}
}