Cryptology ePrint Archive: BibTeX Citation of Report 2015/077

@misc{cryptoeprint:2015:077,
    author = {Yuwei Xu and Chuankun Wu},
    title = {On the Primary Constructions of Vectorial Boolean Bent Functions},
    howpublished = {Cryptology ePrint Archive, Report 2015/077},
    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.