A Note on ``Linear-Communication ACSS with Guaranteed Termination and Lower Amortized Bound''

Xiaoyu Ji; Junru Li; Yifan Song

Paper 2026/469

A Note on ``Linear-Communication ACSS with Guaranteed Termination and Lower Amortized Bound''

Xiaoyu Ji, Tsinghua University

Junru Li

, Tsinghua University, Shanghai Qi Zhi Institute

Yifan Song

, Tsinghua University, Shanghai Qi Zhi Institute

Abstract

In this note, we demonstrate that the construction of asynchronous complete secret sharing (ACSS) proposed in the recent work by Qin et al., accepted at Eurocrypt 2026, is insecure. In particular, we identify several issues affecting the liveness of their protocol and present attacks that compromise its correctness.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Preprint.
Contact author(s): jixy23 @ mails tsinghua edu cn
jr-li24 @ mails tsinghua edu cn
yfsong @ mail tsinghua edu cn
History: 2026-03-08: approved; 2026-03-06: received; See all versions
Short URL: https://ia.cr/2026/469
License: CC BY

BibTeX

@misc{cryptoeprint:2026/469,
      author = {Xiaoyu Ji and Junru Li and Yifan Song},
      title = {A Note on ``Linear-Communication {ACSS} with Guaranteed Termination and Lower Amortized Bound''},
      howpublished = {Cryptology {ePrint} Archive, Paper 2026/469},
      year = {2026},
      url = {https://eprint.iacr.org/2026/469}
}