Cryptology ePrint Archive: BibTeX Citation of Report 2005/224

@misc{cryptoeprint:2005:224,
    author = {L. Chen and Z. Cheng and J. Malone-Lee and N.P. Smart},
    title = {An Efficient ID-KEM Based On The Sakai-Kasahara Key Construction},
    howpublished = {Cryptology ePrint Archive, Report 2005/224},
    year = {2005},
    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.