Cryptology ePrint Archive: BibTeX Citation of Report 2014/697

@misc{cryptoeprint:2014:697,
    author = {Zhigang Chen, Jian Wang, ZengNian Zhang , Xinxia Song},
    title = {A Fully Homomorphic Encryption Scheme with Better Key Size},
    howpublished = {Cryptology ePrint Archive, Report 2014/697},
    year = {2014},
    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.