@misc{cryptoeprint:2009:171,
    author = {Ivan Damgård and Gert Læssøe Mikkelsen
},
    title = {On the Theory and Practice of Personal Digital Signatures},
    howpublished = {Cryptology ePrint Archive, Report 2009/171},
    year = {2009},
    url = {http://eprint.iacr.org/2009/171},
}