Cryptology ePrint Archive: BibTeX Citation of Report 2015/588

@misc{cryptoeprint:2015:588,
    author = {Bimal Mandal and Pantelimon Stanica and Sugata Gangopadhyay and Enes Pasalic},
    title = {An analysis of the $C$ class of bent functions},
    howpublished = {Cryptology ePrint Archive, Report 2015/588},
    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.