Cryptology ePrint Archive: BibTeX Citation of Report 2009/328

@misc{cryptoeprint:2009:328,
    author = {Boris Skoric and Marc X. Makkes},
    title = {Flowchart description of security primitives for Controlled Physical Unclonable Functions},
    howpublished = {Cryptology ePrint Archive, Report 2009/328},
    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.