Cryptology ePrint Archive: BibTeX Citation of Report 2014/854

@misc{cryptoeprint:2014:854,
    author = {Pei Luo, Yunsi Fei, Xin Fang, A. Adam Ding, Miriam Leeser, and David R. Kaeli},
    title = {Power Analysis Attack on Hardware Implementation of MAC-Keccak on FPGAs},
    howpublished = {Cryptology ePrint Archive, Report 2014/854},
    year = {2014},
    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.