Cryptology ePrint Archive: BibTeX Citation of Report 2015/784

@misc{cryptoeprint:2015:784,
    author = {David Leslie and Chris Sherfield and Nigel P. Smart},
    title = {Threshold FlipThem: When the winner does not need to take all},
    howpublished = {Cryptology ePrint Archive, Report 2015/784},
    year = {2015},
    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.