Cryptology ePrint Archive: BibTeX Citation of Report 2011/610

@misc{cryptoeprint:2011:610,
    author = {Nicolas Veyrat-Charvillon and Benoît Gérard and Mathieu Renauld and François-Xavier Standaert},
    title = {An optimal Key Enumeration Algorithm and its Application to Side-Channel Attacks},
    howpublished = {Cryptology ePrint Archive, Report 2011/610},
    year = {2011},
    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.