Cryptology ePrint Archive: BibTeX Citation of Report 2013/277

@misc{cryptoeprint:2013:277,
    author = {Muhammad Rizwan Asghar and Mihaela Ion and Giovanni Russello and Bruno Crispo},
    title = {ESPOON: Enforcing Encrypted Security Policies in Outsourced Environments},
    howpublished = {Cryptology ePrint Archive, Report 2013/277},
    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.