Cryptology ePrint Archive: BibTeX Citation of Report 2008/311

@misc{cryptoeprint:2008:311,
    author = {Orr Dunkelman and Nathan Keller},
    title = {Treatment of the Initial Value in Time-Memory-Data Tradeoff Attacks on Stream Ciphers},
    howpublished = {Cryptology ePrint Archive, Report 2008/311},
    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.