Cryptology ePrint Archive: BibTeX Citation of Report 2011/258

@misc{cryptoeprint:2011:258,
    author = {Gavin Xiaoxu Yao and Junfeng Fan and Ray C.C. Cheung and Ingrid Verbauwhede},
    title = {A High Speed Pairing Coprocessor Using RNS and Lazy Reduction},
    howpublished = {Cryptology ePrint Archive, Report 2011/258},
    year = {2011},
    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.