Cryptology ePrint Archive: BibTeX Citation of Report 2015/018

@misc{cryptoeprint:2015:018,
    author = {JINTAI DING, ALEXEI MIASNIKOV, AND ALEXANDER USHAKOV},
    title = {A LINEAR ATTACK ON A KEY EXCHANGE PROTOCOL USING EXTENSIONS OF MATRIX SEMIGROUPS},
    howpublished = {Cryptology ePrint Archive, Report 2015/018},
    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.