Cryptology ePrint Archive: BibTeX Citation of Report 2010/251

@misc{cryptoeprint:2010:251,
    author = {Ulrich Rührmair and Frank Sehnke and Jan  Sölter and Gideon Dror and Srinivas Devadas and Jürgen Schmidhuber},
    title = {Modeling Attacks on Physical Unclonable Functions},
    howpublished = {Cryptology ePrint Archive, Report 2010/251},
    year = {2010},
    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.