Cryptology ePrint Archive: BibTeX Citation of Report 2011/244

@misc{cryptoeprint:2011:244,
    author = {Erik-Oliver Blass and Roberto Di Pietro and Refik Molva and Melek Onen},
    title = {PRISM -- Privacy-Preserving Search in MapReduce},
    howpublished = {Cryptology ePrint Archive, Report 2011/244},
    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.