Cryptology ePrint Archive: BibTeX Citation of Report 2011/681

@misc{cryptoeprint:2011:681,
    author = {Christina Brzuska and Marc Fischlin and Heike Schr{\"o}der and Stefan Katzenbeisser},
    title = {Physically Uncloneable Functions in the Universal Composition Framework},
    howpublished = {Cryptology ePrint Archive, Report 2011/681},
    year = {2011},
    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.