@misc{cryptoeprint:2002:016,
    author = {Ron Steinfeld and Laurence Bull and Yuliang Zheng},
    title = {Content Extraction Signatures},
    howpublished = {Cryptology ePrint Archive, Report 2002/016},
    year = {2002},
    url = {http://eprint.iacr.org/2002/016},
}