Cryptology ePrint Archive: BibTeX Citation of Report 2005/418

@misc{cryptoeprint:2005:418,
    author = {Chris Crutchfield  and David Molnar and David Turner and David Wagner},
    title = {Generic On-Line/Off-Line Threshold Signatures},
    howpublished = {Cryptology ePrint Archive, Report 2005/418},
    year = {2005},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.