Cryptology ePrint Archive: BibTeX Citation of Report 2009/278

@misc{cryptoeprint:2009:278,
    author = {Ulrich Rührmair Qingqing Chen Paolo Lugli Ulf Schlichtmann Martin Stutzmann György Csaba},
    title = {Towards Electrical, Integrated Implementations of SIMPL Systems},
    howpublished = {Cryptology ePrint Archive, Report 2009/278},
    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.