BLISK: Boolean circuit Logic Integrated into the Single Key

Oleksandr Kurbatov; Yevhen Hrubiian; Illia Melnyk; Lasha Antadze

Paper 2026/088

BLISK: Boolean circuit Logic Integrated into the Single Key

Oleksandr Kurbatov

, Distributed Lab

Yevhen Hrubiian

, Distributed Lab

Illia Melnyk

, Distributed Lab

Lasha Antadze

, Rarilabs

Abstract

This paper introduces BLISK, a framework that compiles a monotone Boolean authorization policy into a single signature verification key, enabling only the authorized signer subset to produce the standard constant-size aggregated signatures. BLISK combines (1) $n$-of-$n$ multisignatures to realize conjunctions, (2) key agreement protocols to realize disjunctions, and (3) verifiable group operations (for instance, based on the 0-ART framework). BLISK avoids distributed key generation (allowing users to reuse their long-term keys), supports publicly verifiable policy compilation, and enables non-interactive key rotation.

Metadata

Available format(s): PDF
Category: Implementation
Publication info: Preprint.
Keywords: Multisignature BLISK Policy Circuit
Contact author(s): ok @ distributedlab com
yevhen hrubian @ distributedlab com
melnykia-ipt @ lll kpi ua
lasha @ rarilabs com
History: 2026-01-25: revised; 2026-01-20: received; See all versions
Short URL: https://ia.cr/2026/088
License: CC BY

BibTeX

@misc{cryptoeprint:2026/088,
      author = {Oleksandr Kurbatov and Yevhen Hrubiian and Illia Melnyk and Lasha Antadze},
      title = {{BLISK}: Boolean circuit Logic Integrated into the Single Key},
      howpublished = {Cryptology {ePrint} Archive, Paper 2026/088},
      year = {2026},
      url = {https://eprint.iacr.org/2026/088}
}