Cryptology ePrint Archive: BibTeX Citation of Report 2004/195

@misc{cryptoeprint:2004:195,
    author = {Katsuyuki Okeya and Katja Schmidt-Samoa and Christian Spahn and Tsuyoshi Takagi},
    title = {Signed Binary Representations Revisited},
    howpublished = {Cryptology ePrint Archive, Report 2004/195},
    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.