@misc{cryptoeprint:1997:015,
    author = {N. Asokan, V. Shoup, M. Waidner},
    title = {Optimistic fair Exchange of Digital Signatures},
    howpublished = {Cryptology ePrint Archive, Report 1997/015},
    year = {1997},
    url = {http://eprint.iacr.org/1997/015},
}