Cryptology ePrint Archive: BibTeX Citation of Report 2015/443

@misc{cryptoeprint:2015:443,
    author = {Xiaolin Xu, Ulrich Rührmair, Daniel E. Holcomb, and Wayne Burleson},
    title = {Security Evaluation and Enhancement of Bistable Ring PUFs},
    howpublished = {Cryptology ePrint Archive, Report 2015/443},
    year = {2015},
    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.