@misc{cryptoeprint:2007:042,
    author = {J. Wu and D. R. Stinson},
    title = {Authorship Proof for Textual Document},
    howpublished = {Cryptology ePrint Archive, Report 2007/042},
    year = {2007},
    url = {http://eprint.iacr.org/2007/042},
}