Cryptology ePrint Archive: BibTeX Citation of Report 2007/333

@misc{cryptoeprint:2007:333,
    author = {Dennis Hofheinz and Dominique Unruh},
    title = {Towards Key-Dependent Message Security in the Standard Model},
    howpublished = {Cryptology ePrint Archive, Report 2007/333},
    year = {2007},
    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.