On the security of two group signature schemes with forward security

Kitae Kim, Ikkwon Yie, Daehun Nyang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A group signature scheme allows a group member of a group to sign messages on behalf of the group anonymously. In case of dispute, a special entity of the group, group manager, can reveal the signer of a valid group signature. In 2005, Zhang et al. Proposed a new group signature with forward security based on their earlier scheme in ICICS 2003. Recently, Zhou et al. Proposed a dynamic group signature scheme with forward security at GCC 2007, In the year of 2008, Zhang and Geung pointed out the scheme is insecure and suggested an improvement. In this paper, we analyze a security analysis of Zhang et al. 's group signature scheme and Zhou et al. 's group signature scheme. We also discuss why the improved Zhou et al. 's scheme by Zhang et al. Is still insecure. Povzetek: Analizirane so varnosti skupinskega podpisovanja dveh modelov: Zhou in Zhang.

Original languageEnglish
Pages (from-to)237-242
Number of pages6
JournalInformatica (Ljubljana)
Issue number2
StatePublished - Jun 2010


  • Cryptanalysis
  • Digital signature
  • Forward security
  • Group signature


Dive into the research topics of 'On the security of two group signature schemes with forward security'. Together they form a unique fingerprint.

Cite this