Efficient Aggregatable BLS Signatures with Chaum-Pedersen Proofs

Jeff Burdges; Oana Ciobotaru; Syed Lavasani; Alistair Stewart

Paper 2022/1611

Efficient Aggregatable BLS Signatures with Chaum-Pedersen Proofs

Jeff Burdges, Web3 Foundation

Oana Ciobotaru, OpenZeppelin

Syed Lavasani, Web3 Foundation

Alistair Stewart, Web3 Foundation

Abstract

BLS signatures have fast aggregated signature verification but slow individual signature verification. We propose a three part optimisation that dramatically reduces CPU time in large distributed system using BLS signatures: First, public keys should be given on both source groups and , with a proof-of-possession check for correctness. Second, aggregated BLS signatures should carry their particular aggregate public key in , so that verifiers can do both hash-to-curve and aggregate public key checks in . Third, individual non-aggregated BLS signatures should carry short Chaum-Pedersen DLEQ proofs of correctness, so that verifying individual signatures no longer requires pairings, which makes their verification much faster. We prove security for these optimisations. The proposed scheme is implemented and benchmarked to compare with classic BLS scheme.

Note: Some corrections. Change of affiliation for second author.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Preprint.
Keywords: aggregated BLS signatures proofs-of-possession Chaum-Pedersen proofs efficient verification
Contact author(s): jeff @ web3 foundation
oana ciobotaru @ gmail com
syed @ web3 foundation
stewart al @ gmail com
History: 2023-09-19: last of 10 revisions; 2022-11-18: received; See all versions
Short URL: https://ia.cr/2022/1611
License: CC BY

BibTeX

@misc{cryptoeprint:2022/1611,
      author = {Jeff Burdges and Oana Ciobotaru and Syed Lavasani and Alistair Stewart},
      title = {Efficient Aggregatable {BLS} Signatures with Chaum-Pedersen Proofs},
      howpublished = {Cryptology {ePrint} Archive, Paper 2022/1611},
      year = {2022},
      url = {https://eprint.iacr.org/2022/1611}
}