Paper 2025/495 Original: eprint.iacr.org/2025/495 ↗
A Security-Enhanced Pairing-Free Certificateless Aggregate Signature for Vehicular Ad-Hoc Networks, Revisited
Abstract
We show that the aggregate signature scheme [IEEE Syst. J., 2023, 17(3), 3822-3833] is insecure against forgery attack. This flaw is due to that the ephemeral key or ephemeral value chosen in the signing phase is not indeed bound to the final signature. An adversary can sign any message while the verifier cannot find the fraud. We also suggest a revising method to frustrate this attack.
Metadata
- Available format(s)
PDF- Category
- Attacks and cryptanalysis
- Publication info
- Preprint.
- History
- 2025-03-16: last updated
- 2025-03-16: published
- Short URL
- https://ia.cr/2025/495
- License
- https://creativecommons.org/publicdomain/zero/1.0/
BibTeX
@misc{cryptoeprint:2025/495,
author = {Zhengjun Cao and Lihua Liu},
title = {A Security-Enhanced Pairing-Free Certificateless Aggregate Signature for Vehicular Ad-Hoc Networks, Revisited},
howpublished = {Cryptology {ePrint} Archive, Paper 2025/495},
year = {2025},
url = {https://eprint.iacr.org/2025/495}
}