@misc{cryptoeprint:2004:077,
    author = {Mihir Bellare and Haixia Shi and Chong Zhang},
    title = {Foundations of Group Signatures: The Case of Dynamic Groups},
    howpublished = {Cryptology ePrint Archive, Report 2004/077},
    year = {2004},
    url = {http://eprint.iacr.org/2004/077},
}