@misc{cryptoeprint:2015:1070,
    author = {Bo Tang and Jiapeng Zhang},
    title = {Barriers to Black-Box Constructions of Traitor Tracing Systems},
    howpublished = {Cryptology ePrint Archive, Report 2015/1070},
    year = {2015},
    url = {https://eprint.iacr.org/2015/1070},
}