Cryptology ePrint Archive: BibTeX Citation of Report 2012/452

@misc{cryptoeprint:2012:452,
    author = {Erik-Oliver Blass and Guevara Noubir and Triet D. Vo-Huu},
    title = {EPiC: Efficient Privacy-Preserving Counting for MapReduce},
    howpublished = {Cryptology ePrint Archive, Report 2012/452},
    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.