Authors
Sourav Das, Philippe Camacho, Zhuolun Xiang, Javier Nieto, Benedikt Bunz, Ling Ren
Publication date
2023
Conference
Proceedings of the 2023 ACM SIGSAC Conference on Computer and Communications Security (CCS)
Description
Threshold signatures protect the signing key by sharing it among a group of signers so that an adversary must corrupt a threshold number of signers to be able to forge signatures. Existing threshold signatures with succinct signatures and constant verification times do not work if signers have different weights. Such weighted settings are seeing increasing importance in decentralized systems, especially in the Proof-of-Stake blockchains. This paper presents a new paradigm for threshold signatures for pairing and discrete logarithm-based cryptosystems. Our scheme has a compact verification key consisting of only 7 group elements, and a signature consisting of 8 group elements. Verifying the signature requires 8 exponentiations and 8 bilinear pairings. Our scheme supports arbitrary weight distributions among signers and arbitrary thresholds. It requires non-interactive preprocessing after a universal powers-of-tau …
Total citations
Scholar articles
S Das, P Camacho, Z Xiang, J Nieto, B Bünz, L Ren - Proceedings of the 2023 ACM SIGSAC Conference on …, 2023