Cryptology ePrint Archive: BibTeX Citation of Report 2009/175

@misc{cryptoeprint:2009:175,
    author = {Stefan Lucks and Erik Zenner and Andre Weimerskirch and Dirk Westhoff},
    title = {Concrete Security for Entity Recognition: The Jane Doe Protocol (Full Paper)},
    howpublished = {Cryptology ePrint Archive, Report 2009/175},
    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.