Cryptology ePrint Archive: BibTeX Citation of Report 2006/321

@misc{cryptoeprint:2006:321,
    author = {Reza Rezaeian Farashahi and Berry Schoenmakers and Andrey Sidorenko},
    title = {Efficient Pseudorandom Generators Based on the DDH Assumption},
    howpublished = {Cryptology ePrint Archive, Report 2006/321},
    year = {2006},
    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.