Cryptology ePrint Archive: BibTeX Citation of Report 2015/945

@misc{cryptoeprint:2015:945,
    author = {Changyu Dong and Franziskus Kiefer},
    title = {Secure Set-based Policy Checking and Its Application to Password Registration},
    howpublished = {Cryptology ePrint Archive, Report 2015/945},
    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.