Cryptology ePrint Archive: BibTeX Citation of Report 2014/442

@misc{cryptoeprint:2014:442,
    author = {Xing Hu and Chunming Tang},
    title = {Secure Outsourced Computation of the Characteristic Polynomial and Eigenvalues of Matrix},
    howpublished = {Cryptology ePrint Archive, Report 2014/442},
    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.