@misc{cryptoeprint:2004:316,
    author = {Zhengjun Cao},
    title = {On a Threshold Group Signature Scheme and a Fair Blind Signature Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2004/316},
    year = {2004},
    url = {http://eprint.iacr.org/2004/316},
}