Cryptology ePrint Archive: BibTeX Citation of Report 2012/256

@misc{cryptoeprint:2012:256,
    author = {Carolyn Whitnall and Elisabeth Oswald and Fran\c{c}ois-Xavier Standaert},
    title = {The myth of generic DPA...and the magic of learning},
    howpublished = {Cryptology ePrint Archive, Report 2012/256},
    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.