Cryptology ePrint Archive: BibTeX Citation of Report 2008/195

@misc{cryptoeprint:2008:195,
    author = {Jin Zhengping and Zuo Huijuan and Du hongzhen and Wen Qiaoyan},
    title = {An Efficient and Provably-Secure Identity-based Signcryption Scheme for Multiple PKGs},
    howpublished = {Cryptology ePrint Archive, Report 2008/195},
    year = {2008},
    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.