@misc{cryptoeprint:2009:406,
    author = {Jacob C. N. Schuldt and Kanta Matsuura},
    title = {On-line Non-transferable Signatures Revisited},
    howpublished = {Cryptology ePrint Archive, Report 2009/406},
    year = {2009},
    url = {http://eprint.iacr.org/2009/406},
}