Cryptology ePrint Archive: BibTeX Citation of Report 2010/134

@misc{cryptoeprint:2010:134,
    author = {Masaaki Shirase},
    title = {Barreto-Naehrig Curve With Fixed Coefficient - Efficiently Constructing Pairing-Friendly Curves -},
    howpublished = {Cryptology ePrint Archive, Report 2010/134},
    year = {2010},
    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.