Cryptology ePrint Archive: BibTeX Citation of Report 2012/232

@misc{cryptoeprint:2012:232,
    author = {Diego F. Aranha and Laura Fuentes-Castañeda and Edward Knapp and Alfred Menezes and Francisco Rodríguez-Henríquez},
    title = {Implementing Pairings at the 192-bit Security Level},
    howpublished = {Cryptology ePrint Archive, Report 2012/232},
    year = {2012},
    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.