Cryptology ePrint Archive: BibTeX Citation of Report 2015/545

@misc{cryptoeprint:2015:545,
    author = {Qinglong Zhang and Zongbin Liu and and Cunqing Ma and Changting Li and Jiwu Jing},
    title = {FROPUF: How to Extract More Entropy from Two Ring Oscillators in FPGA-Based PUFs},
    howpublished = {Cryptology ePrint Archive, Report 2015/545},
    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.