Cryptology ePrint Archive: BibTeX Citation of Report 2012/360

@misc{cryptoeprint:2012:360,
    author = {Céline Blondeau and Benoît Gérard and Kaisa Nyberg},
    title = {Multiple Differential Cryptanalysis using \LLR and $\chi^2$ Statistics},
    howpublished = {Cryptology ePrint Archive, Report 2012/360},
    year = {2012},
    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.