Cryptology ePrint Archive: BibTeX Citation of Report 2009/098

@misc{cryptoeprint:2009:098,
    author = {Martin Albrecht and Craig Gentry and Shai Halevi and Jonathan Katz},
    title = {Attacking Cryptographic Schemes Based on "Perturbation Polynomials"},
    howpublished = {Cryptology ePrint Archive, Report 2009/098},
    year = {2009},
    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.