Consecutive Adaptor Signature Scheme: From Two-Party to N-Party Settings

Kaisei Kajita; Go Ohtake; Tsuyoshi Takagi

Paper 2024/241

Consecutive Adaptor Signature Scheme: From Two-Party to N-Party Settings

Kaisei Kajita, Japan Broadcasting Corporation (Japan)

Go Ohtake, Japan Broadcasting Corporation (Japan)

Tsuyoshi Takagi, University of Tokyo

Abstract

Adaptor signatures have attracted attention as a tool to address scalability and interoperability issues in blockchain applications. Adaptor signatures can be constructed by extending common digital signature schemes that both authenticate a message and disclose a secret witness to a specific party. In Asiacrypt 2021, Aumayr et al. formulated the two-party adaptor signature as an independent cryptographic primitive. In this study, we extend their adaptor signature formulation to parties, present its generic construction, and define the security to be satisfied. Then, we present a concrete construction based on Schnorr signatures and discuss the security properties.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
Keywords: Digital Signatures Adaptor Signatures
Contact author(s): kajita k-bu @ nhk or jp
ohtake g-fw @ nhk or jp
takagi @ mist i u-tokyo ac jp
History: 2024-05-31: revised; 2024-02-15: received; See all versions
Short URL: https://ia.cr/2024/241
License: CC BY

BibTeX

@misc{cryptoeprint:2024/241,
      author = {Kaisei Kajita and Go Ohtake and Tsuyoshi Takagi},
      title = {Consecutive Adaptor Signature Scheme: From Two-Party to N-Party Settings},
      howpublished = {Cryptology {ePrint} Archive, Paper 2024/241},
      year = {2024},
      url = {https://eprint.iacr.org/2024/241}
}