Cryptology ePrint Archive: BibTeX Citation of Report 2015/080

@misc{cryptoeprint:2015:080,
    author = {Feng Hao and Xun Yi and Liqun Chen and Siamak F. Shahandashti},
    title = {The Fairy-Ring Dance: Password Authenticated Key Exchange in a Group},
    howpublished = {Cryptology ePrint Archive, Report 2015/080},
    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.