Cryptology ePrint Archive: BibTeX Citation of Report 2014/331

@misc{cryptoeprint:2014:331,
    author = {Raphael Bost and Raluca Ada Popa and Stephen Tu and Shafi Goldwasser},
    title = {Machine Learning Classification over Encrypted Data},
    howpublished = {Cryptology ePrint Archive, Report 2014/331},
    year = {2014},
    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.