Cryptology ePrint Archive: BibTeX Citation of Report 2009/629

@misc{cryptoeprint:2009:629,
    author = {Sergey Morozov and Abhranil Maiti and Patrick Schaumont,},
    title = {A Comparative Analysis of Delay Based PUF Implementations on FPGA},
    howpublished = {Cryptology ePrint Archive, Report 2009/629},
    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.