Cryptology ePrint Archive: BibTeX Citation of Report 2014/541

@misc{cryptoeprint:2014:541,
    author = {Naofumi Homma and Yu-ichi Hayashi and Noriyuki Miura and Daisuke Fujimoto and Daichi Tanaka and Makoto Nagata and Takafumi Aoki},
    title = {EM Attack Is Non-Invasive?  - Design Methodology and Validity Verification of EM Attack Sensor},
    howpublished = {Cryptology ePrint Archive, Report 2014/541},
    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.