Cryptology ePrint Archive: BibTeX Citation of Report 2013/882

@misc{cryptoeprint:2013:882,
    author = {Zhe Liu and Johann Gro{\ss}sch{\"a}dl},
    title = {New Speed Records for Montgomery Modular Multiplication on 8-bit AVR Microcontrollers},
    howpublished = {Cryptology ePrint Archive, Report 2013/882},
    year = {2013},
    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.