Cryptology ePrint Archive: BibTeX Citation of Report 2009/600

@misc{cryptoeprint:2009:600,
    author = {D. Fiore and R. Gennaro and N.P. Smart},
    title = {Constructing Certificateless Encryption and ID-Based Encryption from ID-Based Key Agreement},
    howpublished = {Cryptology ePrint Archive, Report 2009/600},
    year = {2009},
    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.