Paper 2002/177

two attacks on xia-you Group Signature

Jianhong Zhang, Jilin Wang, and Yumin Wang


Group signature is very important primitive in cryptography. A group signature scheme allows any group member to sign on behalf of the group in an anonymous and unlinkable fashion .In case of dispute, group manager can reveal the identity of the signer. Recently, S.Xia and J.You proposed a group signature scheme based on identity with strong separability in which the revocation manager can work without the involvement of the membership manger. In this paper, we analyze the security of Xia-You group signature and indicate that two or more group members can collude to construct a valid signature and any group member can forge a valid membership certification.

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Published elsewhere. Unknown where it was published
group signatureattacksecurity
Contact author(s)
jhzhs @ hotmail com
2002-11-19: received
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      author = {Jianhong Zhang and Jilin Wang and Yumin Wang},
      title = {two attacks on xia-you Group Signature},
      howpublished = {Cryptology ePrint Archive, Paper 2002/177},
      year = {2002},
      note = {\url{}},
      url = {}
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