Cryptology ePrint Archive: BibTeX Citation of Report 2008/115

@misc{cryptoeprint:2008:115,
    author = {Jean-Luc Beuchat and Nicolas Brisebarre and Jérémie Detrey and Eiji Okamoto and Francisco Rodríguez-Henríquez},
    title = {A Comparison Between Hardware Accelerators for the Modified Tate Pairing over $\mathbb{F}_{2^m}$ and $\mathbb{F}_{3^m}$},
    howpublished = {Cryptology ePrint Archive, Report 2008/115},
    year = {2008},
    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.