@misc{cryptoeprint:2005:122,
    author = {Xinyi Huang and Willy Susilo and Yi Mu},
    title = {Breaking and Repairing Trapdoor-free Group Signature Schemes from Asiacrypt 2004},
    howpublished = {Cryptology ePrint Archive, Report 2005/122},
    year = {2005},
    url = {http://eprint.iacr.org/2005/122},
}