Cryptology ePrint Archive: BibTeX Citation of Report 2010/123

@misc{cryptoeprint:2010:123,
    author = {Craig Costello and Colin Boyd and Juan Manuel Gonzalez Nieto and Kenneth Koon-Ho Wong},
    title = {Delaying Mismatched Field Multiplications in Pairing Computations},
    howpublished = {Cryptology ePrint Archive, Report 2010/123},
    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.