Cryptology ePrint Archive: BibTeX Citation of Report 2015/169

@misc{cryptoeprint:2015:169,
    author = {Daniel R. L. Brown},
    title = {Short Schnorr signatures require a hash function with more than just random-prefix resistance},
    howpublished = {Cryptology ePrint Archive, Report 2015/169},
    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.