Cryptology ePrint Archive: BibTeX Citation of Report 2008/342

@misc{cryptoeprint:2008:342,
    author = {S. Sharmila Deva Selvi and S. Sree Vivek and Neha Jain and Pandu Rangan Chandrasekaran},
    title = {Cryptanalysis of Li et al.'s Identity-Based Threshold Signcryption Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2008/342},
    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.