Cryptology ePrint Archive: BibTeX Citation of Report 2008/517

@misc{cryptoeprint:2008:517,
    author = {Francois-Xavier Standaert and Philippe Bulens and Giacomo de Meulenaer and Nicolas Veyrat-Charvillon},
    title = {Improving the Rules of the DPA Contest},
    howpublished = {Cryptology ePrint Archive, Report 2008/517},
    year = {2008},
    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.