Cryptology ePrint Archive: Report 2005/178
Analyzing Unlinkability of Some Group Signatures
Zhou Sujing and Lin Dongdai
Abstract: Miyaji et.al proposed a fully functional(i.e., satisfying
unforgeability, exculpability,anonymity, traceability,
unlinkability, and revocability.) group signature over only
known-order groups, that is based only on Discrete logarithm
related assumptions, specifically, multiple DLP they proposed in
the same paper [MU04]. In this paper, we point out their
scheme and an improved scheme [ZZW05] do not have unlinkability.
Category / Keywords: Digital Signature, Group Signature.
Date: received 14 Jun 2005, last revised 8 Sep 2005
Contact author: zhousujing at is iscas ac cn
Available formats: PDF | BibTeX Citation
Note: Correct some errors and add in some new information.
Version: 20050908:100219 (All versions of this report)
Discussion forum: Show discussion | Start new discussion
[ Cryptology ePrint archive ]