Cryptology ePrint Archive: BibTeX Citation of Report 2004/177

@misc{cryptoeprint:2004:177,
    author = {S. G. Barwick and W.-A. Jackson and K. M. Martin},
    title = {Updating the Parameters of a Threshold Scheme by Minimal Broadcast},
    howpublished = {Cryptology ePrint Archive, Report 2004/177},
    year = {2004},
    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.