@misc{cryptoeprint:2006:308,
    author = {Jun Shao and Zhenfu Cao and Licheng Wang},
    title = {Efficient ID-based Threshold Signature Schemes without Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2006/308},
    year = {2006},
    url = {http://eprint.iacr.org/2006/308},
}