Cryptology ePrint Archive: BibTeX Citation of Report 2008/020

@misc{cryptoeprint:2008:020,
    author = {Eike Kiltz and Yevgeniy Vahlis},
    title = {CCA2 Secure IBE: Standard Model Efficiency through Authenticated Symmetric Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2008/020},
    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.