Paper 2003/226

On the Security of a Group Signature Scheme with Forward Security

Guilin Wang

Abstract

A group signature scheme allows a group member of a given group to sign messages on behalf of the group in an anonymous and unlinkable way. In case of a dispute, however, a designated group manager can reveal the signer of a valid group signature. Based on Song's forward-secure group signature schemes, Zhang, Wu, and Wang proposed a new group signature scheme with forward security at ICICS 2003. Their scheme is very efficient in both communication and computation aspects. Unfortunately, their scheme is insecure. In this paper we present a security analysis to show that their scheme is linkable, untraceable, and forgeable.

Metadata
Available format(s)
PDF PS
Category
Public-key cryptography
Publication info
Published elsewhere. Revised version appears in the Proc. of ICISC 2003, LNCS 2971, pp. 27-39. Springer-Verlag, 2004.
Keywords
digital signaturegroup signatureforward securitycryptanalysis
Contact author(s)
glwang @ i2r a-star edu sg
History
2004-04-12: last of 2 revisions
2003-10-31: received
See all versions
Short URL
https://ia.cr/2003/226
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2003/226,
      author = {Guilin Wang},
      title = {On the Security of a Group Signature Scheme with Forward Security},
      howpublished = {Cryptology ePrint Archive, Paper 2003/226},
      year = {2003},
      note = {\url{https://eprint.iacr.org/2003/226}},
      url = {https://eprint.iacr.org/2003/226}
}
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