Paper 2003/207
Security Flaws in Several Group Signatures Proposed by Popescu
Guilin Wang and Sihan Qing
Abstract
In resent years, Popescu proposed several group signature schemes based on the Okamoto-Shiraishi assumption in [8-11], and claimed his schemes are secure. However, this paper demonstrates that all these schemes are insecure by identifying some security flaws. Exploiting these flaws, an attacker without any secret can mount universally forging attacks. That is, anybody (not necessarily a group member) can forge valid group signatures on arbitrary messages of his/her choice.
Metadata
- Available format(s)
-
PDF
PS
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Techical Report.
- Keywords
- digital signaturegroup signaturecryptanalysis.
- Contact author(s)
- glwang @ i2r a-star edu sg
- History
- 2003-12-29: last of 4 revisions
- 2003-09-29: received
- See all versions
- Short URL
- https://ia.cr/2003/207
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2003/207,
author = {Guilin Wang and Sihan Qing},
title = {Security Flaws in Several Group Signatures Proposed by Popescu},
howpublished = {Cryptology ePrint Archive, Paper 2003/207},
year = {2003},
note = {\url{https://eprint.iacr.org/2003/207}},
url = {https://eprint.iacr.org/2003/207}
}
