Cryptology ePrint Archive: BibTeX Citation of Report 2015/466

@misc{cryptoeprint:2015:466,
    author = {Zhou Tanping*, Yang Xiaoyuan, Zhang Wei and Wu Liqiang},
    title = {Efficient Fully Homomorphic Encryption with Circularly Secure Key Switching Process},
    howpublished = {Cryptology ePrint Archive, Report 2015/466},
    year = {2015},
    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.