Cryptology ePrint Archive: BibTeX Citation of Report 2004/227

@misc{cryptoeprint:2004:227,
    author = {Johannes Blömer and Martin Otto and Jean-Pierre Seifert},
    title = {Sign Change Fault Attacks On Elliptic Curve Cryptosystems},
    howpublished = {Cryptology ePrint Archive, Report 2004/227},
    year = {2004},
    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.