Cryptology ePrint Archive: BibTeX Citation of Report 2008/304

@misc{cryptoeprint:2008:304,
    author = {Eike Kiltz and Krzysztof Pietrzak and Martijn Stam and Moti Yung},
    title = {A New Randomness Extraction Paradigm for Hybrid Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2008/304},
    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.