Cryptology ePrint Archive: BibTeX Citation of Report 2013/075

@misc{cryptoeprint:2013:075,
    author = {Joppe W. Bos and Kristin Lauter and Jake Loftus and Michael Naehrig},
    title = {Improved Security for a Ring-Based Fully Homomorphic Encryption Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2013/075},
    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.