Cryptology ePrint Archive: BibTeX Citation of Report 2013/720

@misc{cryptoeprint:2013:720,
    author = {Stanislaw Jarecki and Charanjit Jutla and Hugo Krawczyk and Marcel Rosu and Michael Steiner},
    title = {Outsourced Symmetric Private Information Retrieval},
    howpublished = {Cryptology ePrint Archive, Report 2013/720},
    year = {2013},
    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.