Cryptology ePrint Archive: BibTeX Citation of Report 2011/069

@misc{cryptoeprint:2011:069,
    author = {Chao Ning and Qiuliang Xu},
    title = {Constant-Rounds, Linear Multi-party Computation for Exponentiation and Modulo Reduction with Perfect Security},
    howpublished = {Cryptology ePrint Archive, Report 2011/069},
    year = {2011},
    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.