Cryptology ePrint Archive: BibTeX Citation of Report 2006/206

@misc{cryptoeprint:2006:206,
    author = {Ron Steinfeld and Josef Pieprzyk and Huaxiong Wang},
    title = {On the Provable Security of an Efficient RSA-Based Pseudorandom Generator},
    howpublished = {Cryptology ePrint Archive, Report 2006/206},
    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.