Cryptology ePrint Archive: BibTeX Citation of Report 2007/091

@misc{cryptoeprint:2007:091,
    author = {Jean-Luc Beuchat and Nicolas Brisebarre and J\'er\'emie Detrey and Eiji Okamoto},
    title = {Arithmetic Operators for Pairing-Based Cryptography},
    howpublished = {Cryptology ePrint Archive, Report 2007/091},
    year = {2007},
    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.