@misc{cryptoeprint:2011:084,
    author = {Xingwen Zhao and Fangguo Zhang},
    title = {Traitor Tracing against Public Collaboration (Full Version)},
    howpublished = {Cryptology ePrint Archive, Report 2011/084},
    year = {2011},
    url = {http://eprint.iacr.org/2011/084},
}