Cryptology ePrint Archive: BibTeX Citation of Report 2013/033

@misc{cryptoeprint:2013:033,
    author = {Yu Chen and Zongyang Zhang and Dongdai Lin and Zhenfu Cao},
    title = {CCA-Secure IB-KEM from Identity-Based Extractable Hash Proof Systems},
    howpublished = {Cryptology ePrint Archive, Report 2013/033},
    year = {2013},
    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.